/ Dictionary / Index A antibiosis: Meaning and Definition of Find definitions for: an•ti•bi•o•sis Pronunciation: (an"tē-bī-ō'sis, an"tī-), [key] — n. Biol. an association between organisms that is injurious to one of them. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antibiosis (Thesaurus) antibilious antibiotic Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language