Definition of "declarer" [de•clar•er]

• The person who wins the bidding and so declares what suit will be trump. (noun)
• One who declares. (noun)
• A statement that declares the properties of a variable or contributes to doing so. (noun)

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• "The only card that will defeat the contract is the ace of clubs, which sets up two club winners in declarer's hand and appears to give back two tricks in clubs for the one you gain in hearts."
• "Now, when you lead a heart, no declarer, that is no ordinary declarer, will place you with yet another ace."
• "_b_ To call the declarer's attention to the fact that too many or too few cards have been played to a trick;"