/ Dictionary / Index D double-lock: Meaning and Definition of Find definitions for: dou•ble-lock Pronunciation: (dub'ul lok'), [key] — v.t. to lock with two turns of a key, so that a second bolt is engaged. to fasten with particular care. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double-knit double magnum Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language