Inflected forms: pl. fra·ter·ni·ties 1. A body of people associated for a common purpose or interest, such as a guild. 2. A group of people joined by similar backgrounds, occupations, interests, or tastes: the fraternity of bird watchers.3. A chiefly social organization of men students at a college or university, usually designated by Greek letters. 4.Roman Catholic Church A sodality. 5. The quality or condition of being brothers; brotherliness.
ETYMOLOGY:
Middle English fraternite, from Old French, from Latin frternits, from frternus, fraternal. See fraternal.