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Meaning of double run

dou'ble run'

Pronunciation: [key]
— Cribbage. Cribbage.
  1. a set of four cards consisting of a three-card run plus a fourth card of the same denomination as one of the others, as 2, 3, 4, 4, worth eight points.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.