Meaning

• An optional bid made by the side currently holding the highest bid for the contract, after the opposing side has doubled.

Meaning

• To double, especially to double again; to increase considerably; to multiply; to intensify.

  "Having lost sight of our objectives, we redoubled our efforts."

• To double an opponent's doubling bid.

• To become twice as big.

• To double again what was reduced to a single state.