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For the computer operating system see ChorusOS

In classical music a chorus is any substantial group of performers in a play, revue, musical or opera who act more or less as one. It can also mean a work, or section of a work, performed by a chorus. Today, it is most usually used as a synonym for choir to mean a group of singers who all sing together or a piece sung by such a group, but it can also mean a group of dancers, and in Greek drama it meant a group of actors (see also: Greek chorus).

In popular musicPopular music sometimes abbreviated the genre pop music, is music belonging to any of a number of musical styles that are (at least in their heyday) broadly popular. Broadly, any music that is a part of popular culture, including classical, folk, or other, chorus is used to mean the refrainA refrain (from the Old French refraindre "to repeat," likely from Vulgar Latin refringere is the line or lines that are repeated in music or in verse; the " chorus" of a song. Poetic fixed forms that feature refrains include the villanelle the virelay an of a song, which often sharply constrasts the verseVerse is a writing that uses meter as its primary organisational mode, as opposed to prose, which uses grammatical and discoursal units like sentences and paragraphs. Verse may also use rhyme and other technical devices that are often associated with poet melodicallyIn music, a melody is a series of linear events or a succession, not a simultaneity as in a chord. However, this succession must contain change of some kind and be perceived as a single entity (possibly gestalt) to be called a melody. Most specifically th, rhythmRhythm is the variation of the duration of sounds over time. When governed by rule, it is called meter. It is inherent in any time-dependent medium, but it is most associated with music, dance, and most poetry. The study of rhythm, stress, and pitch in spically, and harmonicallyThis article is about musical harmony. For other uses of the term, see Harmony (disambiguation) . Harmony is the art of using pitch simultaneity (or chords, actual or implied) in music. It is sometimes referred to as the "vertical" aspect of music, with m, and assumes a higher level of dynamicsThe word dynamics can refer to: a branch of mechanics; see dynamics (mechanics) the volume of music; see dynamics (music) When used referring to mechanics, it is referring to the study of the motion of both rigid bodies and particles. The field of dynamic and activity, often with added instrumentation. Chorus form, or strophic form, is a sectional and/or additive way of structuring a piece of music based on the repetition of one formal section or block played repeatedly.