- to open (a door, window, etc.) by or as if by removing a bolt; unlock; unfasten.
- to release, as by the removal of threaded bolts: He unscrewed the nuts and unbolted the inspection cover.
- to become unbolted or unfastened.
Origin of unbolt
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unbolt
Eager as themselves, I hastened to unbolt the door and set them free.Confessions Of Con Cregan
Charles James Lever
You've got to go f'm there to the front an' unbolt the door.The Boy Scout Treasure Hunters
Charles Henry Lerrigo
He was angry that she should have dared to unbolt the door, or to withdraw the bars.The Vicar of Bullhampton
This Scott—if he was out of the way, they could unbolt the doors and walk out.The Riddle of the Mysterious Light
Mary E. Hanshew
Can you get through one of these windows, Ito, and unbolt the door?The Mystery Girl
- to unfasten a bolt of (a door)
- to undo (the nut) on a bolt
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012