Interval may refer to:

Mathematics and physics

Interval (mathematics) In mathematics, a (real) interval is a set of real numbers that contains all real numbers lying between any two numbers of the set. For example, the set of numbers satisfying is an interval which contains , , and all numbers in between. Othe ...

, a range of numbers ** Partially ordered set#Intervals, its generalization from numbers to arbitrary partially ordered sets * A statistical

level of measurement Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables. Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scal ...

* Interval estimate * Interval (graph theory) * Space-time interval, the distance between two points in 4-space

Arts and entertainment

Dramatic arts

* Intermission, (British English: interval), a break in a theatrical performance ** '' Entr'acte'', a French term for the same, but used in English often to mean a musical performance played during the break * ''Interval'' (play), a 1939 play by Sumner Locke Elliott * ''Interval'' (film), a 1973 film starring Merle Oberon

Music

Interval (music) In music theory, an interval is a difference in pitch between two sounds. An interval may be described as horizontal, linear, or melodic if it refers to successively sounding tones, such as two adjacent pitches in a melody, and vertical or h ...

, the relationship in pitch between two notes * Intervals (band), a Canadian progressive metal band * ''Intervals'' (See You Next Tuesday album), 2008 * ''Intervals'' (Ahmad Jamal album), 1980

Sport

* Playing time (cricket)#Intervals, the breaks between play in cricket * Interval training, a training technique used by runners and cyclists

Other uses

* Interval Research Corporation, a technology think tank founded by Paul Allen *

Recess (break) Recess is a general term for a period in which a group of people are temporarily dismissed from their duties. In education, recess is the American and Australian term (known as ''break'' or ''playtime'' in the UK), where students have a mid m ...