Interval may refer to:

Mathematics and physics

Interval (mathematics) In mathematics, a real interval is the set of all real numbers lying between two fixed endpoints with no "gaps". Each endpoint is either a real number or positive or negative infinity, indicating the interval extends without a bound. A real ...

, 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 scale ...

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

Arts and entertainment

Dramatic arts

Intermission An intermission, also known as an interval in British and Indian English, is a break between parts of a performance or production, such as for a play (theatre), theatrical play, opera, concert, or film screening. It should not be confused with ...

, (British English: interval), a break in a theatrical performance ** ''

Entr'acte (or , ;Since 1932–35 the recommends this spelling, with no apostrophe, so historical, ceremonial and traditional uses (such as the 1924 René Clair film title) are still spelled . and ', , and ) means 'between the acts'. It can mean a pau ...

'', 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 har ...

, 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 Interval Research Corporation was founded in 1992 by Paul Allen and David Liddle. It was a Palo Alto laboratory and technology incubator focusing on consumer product applications and services with a focus on the Internet. A 1997 version of the ...

, 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 ...