lockset [lok-set] WORD ORIGIN noun an assembly of parts making up a complete locking system, especially one used on a door, including knobs, plates, and a lock mechanism. Liberaldictionary.com Is It Time For All Couples To Use The Term Partner? Can You Translate These Famous Phrases From Emoji? These Are the Longest Words in English These Are the Saddest Phrases in English Origin of lockset lock1 + set Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019