Definition of functor Functor
func•tor
We found 5 definitions of functor from 2 different sources.
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What does functor mean?
Wiktionary 
- functor (Noun)
A function word . - functor (Noun)
A function object . - functor (Noun)
A structure-preserving mapping between categories: if F is a functor from category C to category D, then F maps objects of C to objects of D and morphisms of C to morphisms of D such that any morphism f:X→Y of C is mapped to a morphism Ff: FX → FY of D, such that if h Fg \circ Ff, and such that identity morphisms and only identity morphisms are mapped to identity morphisms. Note: the functor just described is covariant.
OmegaWiki DictionaryOmegaWiki Dictionary Ω
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functor
A mapping from structures of one vocabulary to structures of another vocabulary. -
functor
A special type of mapping between categories.
