/ Dictionary / Index C cosignatory: Meaning and Definition of Find definitions for: co•sig•na•to•ry Pronunciation: (kō-sig'nu-tôr"ē, -tōr"ē), [key] — adj., n., pl. -ries. —adj. signing jointly with another or others. —n. a person who signs a document jointly with another or others; cosigner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cosignatory (Thesaurus) cosign cosigner Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language