/ Dictionary / Index P prolate: Meaning and Definition of Find definitions for: pro•late Pronunciation: (prō'lāt), [key] — adj. elongated along the polar diameter, as a spheroid generated by the revolution of an ellipse about its longer axis (opposed to oblate). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prolate (Thesaurus) prolapsus prolation Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language