to open (a jar, bottle, etc.) by turning the lid or cover.
to permit of being unscrewed.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use unscrew in a sentence
Virag unscrews his head in a trice and holds it under his arm.Ulysses | James Joyce
The die then unscrews, and, in doing so, pushes the turret back.Modern Machine-Shop Practice, Volumes I and II | Joshua Rose
One of these—made out of an old file—is robed in a cloth case; another unscrews in the centre, so as to be more readily carried.
It comes in pieces; the barrel unscrews in the middle, and you can carry it in the hare-pocket of a shooting jacket.'
Train fore and aft, face of mortar forward, throw circle out of gear; 1st Captain stops vent; 2d Captain unscrews spirit-level.Ordnance Instructions for the United States Navy. | Bureau of Ordnance, USN
British Dictionary definitions for unscrew
(tr) to draw or remove a screw from (an object)
(tr) to loosen (a screw, lid, etc) by rotating continuously, usually in an anticlockwise direction
(intr) (esp of an engaged threaded part) to become loosened or separated: the lid wouldn't unscrew
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