The word definition can mean the following:

• Definition usually refers to the association of a word and its meaning. The larger system is the word. The components are the sound and the statement of meaning.
• Definition in graphic arts refers to the quality of a graphic or auditory reproduction.
• Dogmatic definition, in Roman Catholicism, is used by a pope or an ecumenical council. Catholics say, for example, that the pope "defined that the Virgin Mary was conceived innocent of original sin".
• In computer science, a definition consists of a declaration and, possibly, an initializer. Usually, the definition and declaration are the same thing.
• Definition was a long-running Canadian game show of the 1970s and 1980s.

it:Definizione (disambigua)