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once

once [ wunss ]


adverb 
Definition:
 
1. in past: used to indicate that something happened or was the case at some time in the past
The place must have been nice once.
a once comfortable lifestyle

2. one time: on one occasion only

3. by one step: distant by one place or degree
a cousin once removed

4. mathematics multiplied by one: indicating that a number is multiplied by one
once three is three



conj 
Definition:
 
as soon as: happening when something else has happened
Once he got started, it was clear we were dealing with an expert.


all at once 

1. 
suddenly, often unexpectedly
I felt really sick all at once.
 

2. 
all at the same time
She could not read the books all at once.


at once 

1. 
immediately
Tell him at once.
 

2. 
all at the same time
It's a lot to take in at once.


for once happening on this particular occasion, if at no other time
For once my strategy worked.


once and away 

1. 
conclusively
 

2. 
occasionally


once and for all completely and conclusively
We need to clear this up once and for all.


once or twice or once and again on a few occasions, but not often
pausing once and again to listen


once upon a time used at the beginning of fairy tales and children's stories to indicate that something happened a long time ago or in an imaginary world

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