/ Dictionary / Index N nemesis: Meaning and Definition of Find definitions for: nem•e•sis Pronunciation: (nem'u-sis), [key] — pl. -ses something that a person cannot conquer, achieve, etc.: The performance test proved to be my nemesis. an opponent or rival whom a person cannot best or overcome. (cap.)the goddess of divine retribution. an agent or act of retribution or punishment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nemesis (Thesaurus) nemertean nemine contradicente* Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language