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 In statistics, interval estimation is the use of sample data to estimate an '' interval'' of possible values of a parameter of interest. This is in contrast to point estimation, which gives a single value. The most prevalent forms of interval es ...

* 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) Intervals is a Canadian instrumental progressive metal band formed in Toronto, Ontario, in 2011. The band has toured throughout Canada and the United States with bands such as Animals as Leaders, Protest the Hero, Between the Buried and me, and ...

, 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 Interval training is a type of training exercise that involves a series of high-intensity workouts interspersed with rest or break periods. The high-intensity periods are typically at or close to anaerobic exercise, while the recovery periods invol ...

, 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 ...