Definitions
1.nounAn optional bid made by the side currently holding the highest bid for the contract, after the opposing side has doubled.
2.verbTo double, especially to double again; to increase considerably; to multiply; to intensify."Having lost sight of our objectives, we redoubled our efforts."
3.verbTo double an opponent's doubling bid.
4.verbTo become twice as big.
5.verbTo double again what was reduced to a single state.