Meaning of FUNCTOR in English

FUNCTOR

I. ˈfəŋ(k)tə(r) noun

( -s )

Etymology: New Latin, from Latin functus (past participle of fungi to perform) + New Latin -or — more at function

1. : something that performs a function or operation

2. : a sign for a nonpropositional function ; especially : a syncategorematic sign used to indicate operations in symbolic logic

• func·to·ri·al |fəŋ(k)|tōrēəl adjective

II. noun

1. : function word

2. : a rule defined on two mathematical categories that assigns each object and mapping of one category to an object and mapping of the other in such a way as to preserve certain aspects of structure (as identity mappings, composition of mappings, and isomorphism)

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.