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 ...

, a break between classes, also called "interval" in New Zealand *

Jerry Interval Jerry Interval, (October 10, 1923 – December 4, 2006), was an American portrait photographer and educator. The early years Jerry Interval was born in Pittsburgh, Pennsylvania and grew up in the Brookline neighborhood of the city. Wh ...