A definition is a statement of the meaning of a term.

Definition may also refer to:

Science, mathematics and computing

  • In computer programming languages, a declaration that reserves memory for a variable or gives the body of a subroutine
  • Defining equation (physical chemistry), physico-chemical quantities defined in terms of others, in the form of an equation
  • Dynamical system (definition), description of a mathematical model, determined by a system of coupled differential equations
  • Circular definition, lexicographic, linguistic and logical aspects
  • Mathematics:
  • Intensional definition
  • Elementary definition
  • Recursive definition
  • Field of definition
  • A continuous function
  • A well-defined function

Music and TV

  • High-definition television, a television format with higher resolution
  • Definition (album), a 1992 studio album by American crossover thrash band Dirty Rotten Imbeciles
  • Definition (TV series), a long-running Canadian game show of the 1970s and 1980s
  • Definition (Jersey EP), 2001
  • Definition (Diaura EP), 2019
  • "Definition" (song), a 1998 song by Black Star
  • "Definition", a song by Mabel from About Last Night..., 2022
  • "Definitions" (How I Met Your Mother), a 2009 television episode

Other

  • #define, a macro in the C programming language
  • Defined (album), a 2005 operatic pop album
  • Definitions (Plato), a dictionary of about 185 philosophical terms sometimes included in the corpus of Plato's works
  • Dogmatic definition, the pronunciation of religious doctrine by a Pope or an ecumenical council