Transition or transitional may refer to:

Mathematics, science, and technology

Biology

Transition (genetics) Transition, in genetics and molecular biology, refers to a point mutation that changes a purine nucleotide to another purine (Adenine, A ↔ Guanine, G), or a pyrimidine nucleotide to another pyrimidine (Cytosine, C ↔ Thymine, T). Approximatel ...

, a point mutation that changes a purine nucleotide to another purine (A ↔ G) or a pyrimidine nucleotide to another pyrimidine (C ↔ T) *

Transitional fossil A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group. This is especially important where the descendant group is sharply differentiated by gross ...

, any fossilized remains of a lifeform that exhibits the characteristics of two distinct taxonomic groups * A phase during childbirth contractions during which the cervix completes its dilation

Gender and sex

Gender transition Gender transition is the process of affirming and expressing one's internal sense of gender, rather than the sex assigned to them at birth. It is a recommended course of treatment for individuals experiencing gender dysphoria, providing impro ...

, the process of changing one's gender presentation to accord with one's internal sense of one's gender – the idea of what it means to be a man or woman **

Gender-affirming care Transgender health care includes the prevention, diagnosis and treatment of physical and mental health conditions which affect transgender individuals.Gorton N, Grubb HM (2014). General, Sexual, and Reproductive health. In L. Erickson-Schroth. ...

, the physical aspect of a gender transition **

Gender-affirming surgery Gender-affirming surgery (GAS) is a surgical procedure, or series of procedures, that alters a person's physical appearance and sexual characteristics to resemble those associated with their gender identity. The phrase is most often associated ...

, surgical intervention a part of medical gender affirmation

Physics

Phase transition In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic Sta ...

, a transformation of the state of matter; for example, the change between a solid and a liquid, between liquid and gas or between gas and plasma *

Quantum phase transition In physics, a quantum phase transition (QPT) is a phase transition between different quantum phases ( phases of matter at zero temperature). Contrary to classical phase transitions, quantum phase transitions can only be accessed by varying a phys ...

, a phase transformation between different quantum phases * Quantum Hall transitions, a quantum phase transition that occurred because of the quantum Hall effect * Transition radiation, contrasts to the

Cherenkov radiation Cherenkov radiation () is electromagnetic radiation emitted when a charged particle (such as an electron) passes through a dielectric medium (such as distilled water) at a speed greater than the phase velocity (speed of propagation of a wavefro ...

Atomic electron transition In atomic physics and chemistry, an atomic electron transition (also called an atomic transition, quantum jump, or quantum leap) is an electron changing from one energy level to another within an atom or artificial atom. The time scale of a qua ...

, the transition of an electron from one quantum state to another within an atom *

Beta decay transition In nuclear physics, a beta decay transition is the change in state of an atomic nucleus undergoing beta decay. When undergoing beta decay, a nucleus emits a beta particle and a corresponding neutrino, transforming the original nuclide into one ...

, nuclear beta decay determined by changes in spin *

Laminar–turbulent transition In fluid dynamics, the process of a Laminar flow, laminar flow becoming turbulent is known as laminar–turbulent transition. The main parameter characterizing transition is the Reynolds number. Transition is often described as a process proceedi ...

, the process of a laminar fluid flow becoming turbulent *

Glass transition The glass–liquid transition, or glass transition, is the gradual and Reversible reaction, reversible transition in amorphous solid, amorphous materials (or in amorphous regions within Crystallinity, semicrystalline materials) from a hard and rel ...

, the reversible transition in amorphous materials * Lambda transition, universality class in condensed matter physics

Chemistry

Transition metal In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded. The lanthanide and actinid ...

, either an element whose atom has an incomplete d sub-shell, or any element in the d-block of the periodic table *

Transition state In chemistry, the transition state of a chemical reaction is a particular configuration along the reaction coordinate. It is defined as the state corresponding to the highest potential energy along this reaction coordinate. It is often marked w ...

, of a chemical reaction is a particular configuration along the reaction coordinate * SRM transition, the precursor and product ion pair in

selected reaction monitoring Selected reaction monitoring (SRM), also called multiple reaction monitoring (MRM), is a method used in tandem mass spectrometry in which an ion of a particular mass is selected in the first stage of a tandem mass spectrometer and an ion product ...

(SRM) in analytical chemistry

Computing

* A movement between states of an abstract computer, described by a

transition system In theoretical computer science, a transition system is a concept used in the study of computation. It is used to describe the potential behavior of discrete systems. It consists of states and transitions between states, which may be labeled wi ...

* A phase of the

rational unified process The rational unified process (RUP) is an iterative software development process framework created by the Rational Software Corporation, a division of IBM since 2003. RUP is not a single concrete prescriptive process, but rather an adaptable proc ...

* A paradigm describing changes of communication mechanisms; see

Transition (computer science) Transition refers to a computer science paradigm in the context of communication systems which describes the change of communication mechanisms, i.e., functions of a communication system, in particular, service and Communications protocol, protocol ...

Other uses in technology

Terrafugia Transition The Terrafugia Transition is a light sport aircraft, light sport, roadable aircraft, roadable airplane under development by Terrafugia since 2006. The Rotax 912#Variants, Rotax 912ULS piston engine powered, carbon-fiber vehicle is planned to h ...

, a flying car (or drivable airplane) * Transitions, a brand of photochromic eyeglass lens and sponsor of the PGA Tour Transitions Championship * "Shifting gears" on a railroad locomotive; see Diesel locomotive#Propulsion system operation

Government and politics

* Brexit withdrawal agreement#Transition period *

Democratic transition A democratic transition describes a phase in a country's political system as a result of an ongoing change from an authoritarian regime to a Democracy, democratic one. The process is known as democratisation, political changes moving in a democrat ...

, change to a democratic regime *

Peaceful transition of power A peaceful transition or transfer of power is a concept important to democracy, democratic governments in which the leadership of a government peacefully hands over control of government to a newly elected leadership. This may be after elections o ...

a norm or practice in democratic governments, of transitions of power between different political parties *

Social change Social change is the alteration of the social order of a society which may include changes in social institutions, social behaviours or social relations. Sustained at a larger scale, it may lead to social transformation or societal transformat ...

, often synonymous with social transition *

Transition management (governance) Transition management, in the financial sense, is a service usually offered by sell side institutions to help buy side firms transition a portfolio of securities. Various events including acquisitions and management changes can cause the need ...

United States presidential transition In the United States, a presidential transition is the process during which the president-elect of the United States prepares to take over the administration of the federal government of the United States from the incumbent President of the Uni ...

, the transfer of federal executive branch power from the incumbent President of the United States to the president-elect

Arts and entertainment

Literature

* Transition (fiction), a narrative element or general aspects of writing style that signal changes in a story *

Transition (linguistics) A transition or linking word is a word or phrase that shows the relationship between paragraphs or sections of a text or speech. Transitions provide greater cohesion by making it more explicit or signaling how ideas relate to one another. Transiti ...

, a certain word, expression, or other device that gives text or speech greater cohesion by making it more explicit

Works

* ''Transition'' (literary journal), an experimental literary journal that featured surrealist, expressionist, and Dada art and artists * ''Transition'', a novel by Iain Banks * ''Transition'', a novel by

Vonda N. McIntyre Vonda Neel McIntyre () was an American science fiction writer and biologist. Early life and education Vonda N. McIntyre was born in Louisville, Kentucky, the daughter of H. Neel and Vonda B. Keith McIntyre, who were born in Poland, Ohio. She s ...

1990 * '' Transition Magazine'', a political and literary journal published from 1961 to 1976 on the African continent, and revived in 1991 in the United States * ''Transitions'' (novel series), a novel series by R A Salvatore * Transitions Online, Czech publisher of the ''Transitions'' news journal

Film, radio, and television

Film transition A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, sinc ...

, a method of juxtaposing two scenes, including: **

Wipe (transition) Examples of various wipe transitions In filmmaking, a wipe is a type of film transition where one shot replaces another by travelling from one side of the frame to another or with a special shape. If the wipe proceeds from two opposite edges ...

, a type of film transition where one shot replaces another by travelling from one side of the frame to another or with a special shape **

Dissolve (filmmaking) In the post-production process of film editing, film and video editing, a dissolve (sometimes called a lap dissolve) is a type of film transition in which one Sequence (filmmaking), sequence fades over another. The terms fade-out (also called ...

, a gradual transition from one image to another * "Transition" (''The West Wing''), season 7 episode 19 of US television series ''The West Wing'' * ''Transitions'' (film), the world's first IMAX film in 3D, 1986 * Transition (1989 film), a film by the Iranian director Kamal Tabrizi * ''Transition'' (2023 film), a documentary film * Transitions (radio show), a weekly two-hour radio show on Kiss 100 in the UK * "Transitioning" (''Glee''), an episode of US television series ''Glee'' * "Transitions" (''Law & Order: Special Victims Unit'' episode), season 10 episode 14 of US television series ''Law & Order: Special Victims Unit'' * "Transitions" (''The Wire''), an episode of US television series ''The Wire'' * "Transitions", an episode of US television series ''Without a Trace''

Music

* Transition (music), the middle passage of a piece of music * Transition (band), English indie rock band

Albums

* ''Transition'' (John Coltrane album), 1970 * ''Transition'' (The First Edition album), 1971 * ''Transition'' (Buddy Rich Lionel Hampton album), 1974 * ''Transition'' (John Miles album), 1985 * ''Transition'' (Fly to the Sky album), 2006 * ''Transition'' (Ryan Leslie album), 2009 * ''Transition'' (Chipmunk album), 2011 * ''Transition'' (Steve Lukather album), 2013 * ''Transitions'' (John Digweed album), 2006 * ''Transitions'' (Aghora album), 2006 * ''Transitions'' (Westbound Train album), 2006 * ''Transitions'' (EP), 2010 by Canadian post-hardcore band Silverstein

Songs

* "Transition", by Pestilence from '' Obsideo'', 2013 * "Transition", by Theatre Of Tragedy from ''

Forever Is the World ''Forever Is the World'' is the seventh and final studio album by the Norwegian gothic metal band Theatre of Tragedy. It was released on 18 September 2009, on AFM Records. The album was produced by the Zeromancer singer Alexander Møklebust an ...

'', 2009 * "The Transition", by Hawthorne Heights from '' The Silence in Black and White'', 2004 * "Transitions", by Beastie Boys from '' Ill Communication'', 1994 * "Transitions", by Zao from ''

The Crimson Corridor ''The Crimson Corridor'' is the eleventh studio album by American metalcore band Zao. The album was released on April 9, 2021, through Observed/Observer Recordings, the band's own record label. Recording and lyrics The album began the recording ...

'', 2021

Other arts

* Transitional Style, of furniture and interior design

Sport

Transition (grappling) A transition in grappling is a move from one grappling hold or grappling position to another. The process is called transitioning and is one of the most important aspects of ground grappling, as it allows the combatant performing the transition t ...

, in grappling is a move from one grappling hold or grappling position to another * Transitions Championship, a men's professional golf tournament on the PGA Tour

Other uses

* Transition Glacier, a glacier on the east coast of Alexander Island *

Transitional care Transitional care refers to the coordination and continuity of health care during a movement from one healthcare setting to either another or to home, called care transition, between health care practitioners and settings as their condition and care ...

, wherein a patient changes health care provider