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Definition of noon noun from the Oxford Advanced American Dictionary

 

noon

 noun
noun
NAmE//nun//
 
[uncountable]
 
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  • 12 o'clock in the middle of the day synonym midday We should be there by noon. The conference opens at 12 noon on Saturday. the noon deadline for the end of hostilities I'm leaving on the noon train. the glaring light of high noon
  • Idioms
    morning, noon, and night
     
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    at all times of the day and night (used to emphasize that something happens very often or that it happens continuously) She talks about him morning, noon, and night. The work continues morning, noon, and night.
    See noon in the Oxford Advanced Learner's Dictionary