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informatory double

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noun Bridge.
  1. a double intended to inform one's partner that one has a strong hand and to urge a bid regardless of the strength of his or her hand.
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Origin of informatory double

First recorded in 1925–30; informat(ion) + -ory1
Also called takeout double.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018