double check

noun Chess.
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.
Dictionary.com Unabridged

dou·ble-check

[duhb-uhl-chek]
verb (used with object), verb (used without object)
1.
to check twice or again; recheck.
noun
2.
a second examination or verification to assure accuracy, proper functioning, or the like.

Origin:
1950–55, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To double check
00:10
Double check is always a great word to know.
So is ort. Does it mean:
the offspring of a zebra and a donkey.
a scrap or morsel of food left at a meal.
Collins
World English Dictionary
double-check
 
vb
1.  to check twice or again; verify
 
n
2.  a second examination or verification
3.  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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
For older kids, be sure to check and double check that they have everything
  they need.
If there are no processing limitations or exceptions, double check the
  information provided for accuracy.
Double check the blood specimen to ensure that it is sealed and labeled.
Double check and make sure that the year of the end time didn't get messed up.
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