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, 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, 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, the physical aspect of a gender transition ** Gender-affirming surgery, 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, 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 * Atomic electron transition, the transition of an electron from one quantum state to another within an atom * Beta decay transition, nuclear beta decay determined by changes in spin * Laminar–turbulent transition, 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, 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 (SRM) in analytical chemistry

Computing

* A movement between states of an abstract computer, described by a transition system * A phase of the rational unified process * A paradigm describing changes of communication mechanisms; see Transition (computer science)

Other uses in technology

* Terrafugia Transition, 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, change to a democratic regime * Peaceful transition of power 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, 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 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 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 method of juxtaposing two scenes, including: ** Wipe (transition), 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'', 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'', 2021

Other arts

* Transitional Style, of furniture and interior design

Sport

* Transition (grappling), 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, wherein a patient changes health care provider