Definition of unbutton
1 : to loose the buttons of
2 : to open by or as if by loosing buttons
: to undo buttons
First Known Use of unbutton
UNBUTTON Defined for English Language Learners
Definition of unbutton for English Language Learners
: to open the buttons of (something)
UNBUTTON Defined for Kids
Definition of unbutton for Students
: to unfasten the buttons of I unbuttoned my shirt.
Seen and Heard
What made you want to look up unbutton? Please tell us where you read or heard it (including the quote, if possible).