noun
( plural knights of columbus )
Usage: usually capitalized K&C
Etymology: after Christopher Columbus — more at columbus
: a member of a fraternal and benevolent society of Roman Catholic men founded at New Haven, Conn., in 1882 to promote social and intellectual intercourse among its members, to aid its members and beneficiaries, to protect and promote Catholic interests, and to foster a spirit of fraternity among citizens of all races and creeds