/ Dictionary / Index T thesis play: Meaning and Definition of Find definitions for: the'sis play" Pronunciation: [key] a play that develops or defends a particular thesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thesis Thespiae Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language