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1

once

play
adverb \ˈwən(t)s\

Simple Definition of once

  • : one time only

  • : at any one time

  • : at some time in the past

Source: Merriam-Webster's Learner's Dictionary

Full Definition of once

  1. 1 :  one time and no more <rode a horse only once>

  2. 2 :  at any one time :  under any circumstances :  ever <didn't once thank me>

  3. 3 :  at some indefinite time in the past :  formerly <was once a booming mining town>

  4. 4 :  by one degree of relationship <first cousin once removed>

once and for all
  1. 1 :  with finality :  definitively

  2. 2 :  for the last time

once in a while

Examples of once in a sentence

  1. I will repeat the question once.

  2. The play was performed only once.

  3. She didn't once thank me.

  4. He didn't look at me once.

  5. It was once done that way.

  6. A river once flowed through this canyon.

  7. It was once a booming mining town.

  8. Their music was once very popular.



Origin of once

Middle English ones, from genitive of on one


First Known Use: 12th century


2

once

noun

Simple Definition of once

  • : one single time

Source: Merriam-Webster's Learner's Dictionary

Full Definition of once

  1. :  one single time :  one time at least <please be on time this once>

at once
  1. 1 :  at the same time :  simultaneously

  2. 2 :  immediately

  3. 3 :  2both <at once funny and sad>

Examples of once in a sentence

  1. I have tried Indian food more than once.

  2. Please be on time just this once.

  3. For once you seem to know what I'm talking about.



13th Century

First Known Use of once

13th century


3

once

adjective

Definition of once

  1. :  that once was :  former <a once successful actor>



Examples of once in a sentence

  1. <the once child star is now a lawyer in the entertainment industry>



1691

First Known Use of once

1691


4

once

conjunction

Simple Definition of once

  • : at the moment when : as soon as

Source: Merriam-Webster's Learner's Dictionary

Full Definition of once

  1. :  at the moment when :  as soon as <once she spoke, I recognized her>

Examples of once in a sentence

  1. Once she spoke, I recognized her.

  2. <you should have stopped wrestling once you knew someone was getting hurt, not five minutes later>



1761

First Known Use of once

1761



ONCE Defined for Kids

1

once

play
adverb \ˈwəns\

Definition of once for Students

  1. 1 :  one time only <It happened just once.>

  2. 2 :  at some time in the past :  formerly <It was once done that way.>

  3. 3 :  at any one time :  ever <She didn't once thank me.>

once and for all
  1. :  now and for the last time <That should solve the problem once and for all.>

once in a while
  1. :  from time to time <I play golf once in a while.>




2

once

play
noun

Definition of once for Students

  1. :  one single time <We can make an exception just this once.>

at once
  1. 1 :  at the same time <I can't understand with both of you talking at once.>

  2. 2 :  immediately 2 <Leave at once.>




3

once

play
conjunction

Definition of once for Students

  1. :  as soon as :  when <Once you've finished your homework, you may go outside.>





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immature or lacking adult sophistication

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