Breadcrumb Home > Dictionary > Index K keyless: Meaning and Definition of Find definitions for: key•less Pronunciation: (kē'lis), [key] — adj. lacking a key or keys. requiring no key or keys: a keyless lock operated by a series of push buttons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: keyless (Thesaurus) Key Largo key light ✖ Related Content Daily Word Quiz: contretemps Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language