- Once means one time.
An example of once is doing something one day each week, once a week.
- Once is defined as whenever or as soon as.
An example of once is saying when your friend arrives you'll be leaving, you'll leave once your friend arrives.
- one time; one time only: to eat once a day
- at any time; at all; ever: she'll succeed if once given a chance
- at some time in the past; formerly: a once famous man
- by one degree or grade: a cousin once removed
Origin of onceMiddle English ones, genitive of on, one
all at once
- all at the same time
- at the same time
once and again
once (and) for all
once in a while
once or twice
once upon a time
- One time only: once a day.
- At one time in the past; formerly.
- At any time; ever: Once known, his face is never forgotten.
- By one degree of relationship: my first cousin once removed.
Origin of onceMiddle English ones, from on, one, from Old English ān; see oi-no- in Indo-European roots.
- (frequency) One and only one time.
- I have only once eaten pizza.
- (temporal location) Formerly; during some period in the past.
- He was once the most handsome man around.
- I once had a bicycle just like that one.
- (mathematics) multiplied by one: indicating that a number is multiplied by one
- Once three is three.
- As soon as.