/ Dictionary / Index S semiround: Meaning and Definition of Find definitions for: sem•i•round Pronunciation: (sem"ē-round', sem"ī-), [key] — adj. having one surface that is round and another that is flat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. semirigid semis Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language