Double check
WordNet

noun


(1)   Something that checks the correctness of a previous check
WiktionaryText

Verb


to double check
  1. to check again; to check with extra caution or attention; to verify or make sure
    I'm pretty sure that he's not coming, but I can double check the guest list.

Noun


double check
  1. A situation in which a king is attacked by two of the opponent's men at once.
 
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