/ Dictionary / Index B brethren: Meaning and Definition of Find definitions for: breth•ren Pronunciation: (bre'rin), [key] — n.pl. fellow members. brothers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: brethren (Thesaurus) bretelle Breton Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language