button
noun
[ ˈbʌt(ə)n ]
• a small disc or knob sewn on to a garment, either to fasten it by being pushed through a slit made for the purpose or for decoration.
• a small device on a piece of electrical or electronic equipment which is pressed to operate it.
Similar:
knob,
switch,
on/off switch,
push switch,
disc,
lever,
handle,
key,
control,
controller,
• a badge bearing a design or slogan and pinned to clothing.
button
verb
• fasten (clothing) with buttons.
• "I buttoned my shirt and knotted my tie"
• stop talking.
Origin:
Middle English: from Old French bouton, of Germanic origin and related to butt1.
on the button
• punctually.
• "we arrived at 5.20 on the button"
