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• double check
  double check

  noun

  a simultaneous check by two pieces in which the moving of one piece to give check also results in discovering a check by another piece.
• double-check
  double-check

  verb (used with or without object)

  to check twice or again; recheck.

double check

¹ American  

noun

Chess.

1. a simultaneous check by two pieces in which the moving of one piece to give check also results in discovering a check by another piece.

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double-check ² American  

[duhb-uhl-chek] / ˈdʌb əlˈtʃɛk /

verb (used with or without object)

1. to check twice or again; recheck.

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noun

1. a second examination or verification to assure accuracy, proper functioning, or the like.

double-check British  

verb

1. to check twice or again; verify

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noun

1. a second examination or verification

2. chess a simultaneous check from two pieces brought about by moving one piece to give check and thereby revealing a second check from another piece

Etymology

Origin of double-check

An Americanism dating back to 1950–55

Example Sentences

He suggested airline passengers double check with their airline to make sure their reservation is intact.

From MarketWatch • Apr. 28, 2026

Moreover, workers may also have outsize expectations around AI’s automation capabilities, with many of the current tools still requiring workers to double check the completed work for errors.

From Barron's • Mar. 27, 2026

Last year one of its accounts posted a video inside the REI Soho bathroom to double check it was still open and provided free menstrual products to visitors.

From The Wall Street Journal • Oct. 17, 2025

But double check that the expiry date on your passport is dated at least three months after the day you plan to leave.

From BBC • Jun. 28, 2025

"Check and double check for both of us!"

From Dave Dawson at Dunkirk by Bowen, Robert Sydney

Related Words

• affirm
• approve
• back
• certify
• corroborate
• endorse
• establish
• explain
• sign
• substantiate
• support
• uphold
• verify