the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
source: WordNet 3.0
someone who claims to speak the truth
A bold asserter. A declarer of his intentions. Affirmers of traditional doctrine. An asseverator of strong convictions. An avower of his own great intelligence.
source: WordNet 3.0
One who makes known or proclaims; that which exhibits.