Meaning of double check

dou'ble check'

Pronunciation: [key]
— Chess. 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.

dou'ble-check

Pronunciation: (dub'ul chek'), [key]
— v.t., v.i.
  1. to check twice or again; recheck.
—n.
  1. a second examination or verification to assure accuracy, proper functioning, or the like.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.