Composition (language), in literature, oratory, and rhetoric, producing a work of spoken tradition or written literature

Relation composition, an operation that takes relations and gives a single relation as the result

Object composition, combining simpler data types into more complex data types, or function calls into calling functions

Musical composition, an original piece of music

Composition (visual arts), the plan, placement or arrangement of the elements of art in a work

Compose key, a key on a computer keyboard

Function composition, an operation that takes functions and gives a single function as the result

Function composition (computer science), an act or mechanism to combine simple functions to build more complicated ones

A law of composition, usually called a binary function

Composition studies, the professional field of writing instruction

Composition (logical fallacy), a fallacy of ambiguation in which one assumes that a whole has a property solely because its various parts have that property

Composition (number theory), a way of writing a positive integer as a sum of positive integers

Early Germanic law, concerning the use of the term composition, or making a payment instead of receiving a punishment. With reference to the modern period, see Ausgleich, also called the Composition of 1867.