/ Dictionary / Index U usable: Meaning and Definition of Find definitions for: us•a•ble Pronunciation: (y'zu-bul), [key] — adj. available or convenient for use: 2000 square feet of usable office space. capable of being used: That saw is no longer usable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: usable (Thesaurus) USA U.S.A.F. Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language