1. Lacking or not requiring a key
   "a keyless lock operated by a series of pushbuttons"

Antonym: keyed

Encyclopedia: Keyless

• free-enterprise
• free-floating
• free-flying
• free-for-all
• free-liver
• free-living
• free-range
• free-reed
• free-reed instrument
• free-soil
• free-spoken
• free-swimming
• free-to-air
• freebee
• freebie
• freeboard
• freeboard deck
• freebooter
• freeborn
• freedman
• freedom
• freedom fighter
• freedom from cruel and unusual punishment
• freedom from discrimination
• freedom from double jeopardy