/ Dictionary / Index P prostasis: Meaning and Definition of Find definitions for: pro•sta•sis Pronunciation: (prō-stā'sis), [key] — pl. -ses (in a classical temple) a pronaos or prostas before a cella. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prostas prostate Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language