/ Dictionary / Index S signable: Meaning and Definition of Find definitions for: sign•a•ble Pronunciation: (sī'nu-bul), [key] — adj. suitable for signing, as in being satisfactory, appropriate, or complete: a signable legislative bill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. signa Signac Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language