on the button
Exactly, precisely.
They arrived at 3:30, on the button.
ADJ
bottom, top
She fastened the bottom button of her coat before stepping outside into the cold wind.
coat, shirt, etc.
VERB + BUTTON
do up, fasten | undo, unfasten | fumble with
lose
I lost a button from my shirt while playing basketball yesterday.
rip off | sew on
BUTTON + VERB
be missing, come off, pop (off)
A button came off my coat when I was getting dressed this morning.
ADJ
on, start/starter | off, stop | control | fast forward, pause, play, rewind
alarm, panic
When the fire started, he immediately pressed the panic button to alert everyone in the building.
mouse
self-destruct
He pressed the self-destruct button and deleted all his embarrassing photos from the internet.
VERB + BUTTON
click (on)
You need to click the red button to start the printer.
depress, hit, hold down, press, push
She pushed the red button to start the washing machine.
keep your finger on | release, take your finger off
PHRASES
at the touch of a button
Modern cars can lock their doors at the touch of a button.