Definitions

1. verb

to undo the fastening of (a garment, especially a shirt) by unfastening the buttons, or to come undone, typically with a ripping sound.

“She had to disbutton her shirt quickly as the zipper had jammed.”

2. noun

a button that has come undone, especially from a shirt.

“She picked up the disbutton that had fallen to the floor.”

3. verb

to separate or come apart with a ripping sound, especially in a way that is violent or sudden.

“The seam disbuttoned as she pulled the fabric too hard.”