See more synonyms for unbolt on Thesaurus.com
verb (used with object)
  1. to open (a door, window, etc.) by or as if by removing a bolt; unlock; unfasten.
  2. to release, as by the removal of threaded bolts: He unscrewed the nuts and unbolted the inspection cover.
verb (used without object)
  1. to become unbolted or unfastened.

Origin of unbolt

1425–75; late Middle English; see un-2 + bolt1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unbolt

Historical Examples of unbolt

British Dictionary definitions for unbolt


verb (tr)
  1. to unfasten a bolt of (a door)
  2. 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