once and for all
Conclusively, finally, permanently.
They replaced the entire door, in hopes of correcting the sticking and squeaking once and for all.
adv
One and only one time.
I have only once eaten pizza.
Formerly; during some period in the past.
He was once the most handsome man around.
I once had a motorbicycle.
At any time; ever.
The wisdom of God thought fit to acquaint David with that court which we shall once govern.
If the facts once became known, we'd be in trouble.
One day, someday.
Multiplied by one: indicating that a number is multiplied by one.
Once three is three.
conj
As soon as; when; after.
Near-synonym: immediately
We'll get a move on once we find the damn car keys!
noun
Obsolete form of ounce.