/ Dictionary / Index E expansion attic: Meaning and Definition of Find definitions for: expan'sion at"tic Pronunciation: [key] an attic space designed or suitable to be finished as a living space. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. expansionary expansion bit Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language