verb (used with object)
to free (buttons) from buttonholes; unfasten or undo.
to unfasten by or as if by unbuttoning: to unbutton a jacket.
to disclose (one's feelings, thoughts, etc.) after deliberate or prolonged silence.
verb (used without object)
to unfasten a button or one's buttons.
Origin of unbutton
First recorded in 1275–1325, unbutton
is from the Middle English
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for unbutton
Historical Examples of unbutton
Why so anxious about the sit of cloaks; and gloves—whether to button or unbutton?
She saw Richard Crawford unbutton his vest, a little assisted by the Colonel.
If gossip, then, be a gallows 39matter, let Bell unbutton him for the end.
His only reaction to this was to step forward and continue to unbutton her blouse.
Her mother had to unbutton the hard top button but she did all the rest.
British Dictionary definitions for unbutton
to undo by unfastening (the buttons) of (a garment)
informal to release or relax (oneself, tension, etc)
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
Word Origin and History for unbutton
early 14c., from un- (2) "opposite of" + button (v.). Related: Unbuttoned; unbuttoning.
Online Etymology Dictionary, © 2010 Douglas Harper