/ Dictionary / Index S superfetation: Meaning and Definition of Find definitions for: su•per•fe•ta•tion Pronunciation: (s"pur-fē-tā'shun), [key] — n. the fertilization of an ovum in a female mammal already pregnant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: superfetation (Thesaurus) superfecundation superficial Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language