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once

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1once/ˈwʌns/adverb
1once
/ˈwʌns/
adverb
Learner's definition of ONCE  
: one time only
: at any one time : ever
: at some time in the past — sometimes used in combination

once again/more

: for another time : one more time : again

once and for all

: now and for the last time

once bitten, twice shy

— see 1bite

once in a blue moon

— see blue moon

once in a while

: sometimes but not often : occasionally

once upon a time

: at some time in the past
Once upon a time is the traditional way to begin a fairy tale.
2once/ˈwʌns/noun
2once
/ˈwʌns/
noun
Learner's definition of ONCE  
[noncount]
: one single time

at once

: at the same time
: right away : without delay : immediately
3once/ˈwʌns/conjunction
3once
/ˈwʌns/
conjunction
Learner's definition of ONCE  
: at the moment when : as soon as
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Comments & Questions
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