Definition of explicit definition in US English:

explicit definition

noun

Philosophy Logic
  • A definition which formally sets out the meaning of a concept or expression, as by specifying necessary and sufficient conditions for its applicability; a statement to the effect that the expression being defined has the same meaning as another expression which defines it; a definition which can be substituted for the defined expression in sentences in which that expression occurs.

Origin

Mid 19th century; earliest use found in Bibliotheca Sacra.