'Unbutton' definitions:
Definition of 'unbutton'
(from WordNet)
verb
Undo the buttons of; "unbutton the shirt" [ant: button]
Definition of 'Unbutton'
From: GCIDE
- Unbutton \Un*but"ton\, v. t. [1st pref. un- + button.] To loose the buttons of; to unfasten. [1913 Webster]
Synonyms of 'unbutton'
From: Moby Thesaurus