Definition of pins and needles noun from the Oxford Advanced American Dictionary

 

pins and needles

 noun
noun
 
[uncountable]
 
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  • an uncomfortable feeling in a part of your body, caused when a normal flow of blood returns after it has been partly blocked, especially because you have been sitting or lying in an awkward position to have pins and needles
  • Idioms
    on pins and needles(informal)
     
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    very nervous, worried, or anxious, especially when you are waiting to find out something Everyone was on pins and needles waiting for the results.
    See the Oxford Advanced Learner's Dictionary entry: pins and needles