Declarer

from WordNet (r) 3.0 (2006)

declarer
    n 1: the bridge player in contract bridge who wins the bidding
         and can declare which suit is to be trumps [syn:
         {contractor}, {declarer}]
    2: 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" [syn: {asserter}, {declarer},
       {affirmer}, {asseverator}, {avower}]

from The Collaborative International Dictionary of English v.0.48

Declarer \De*clar"er\, n.
   One who makes known or proclaims; that which exhibits.
   --Udall.
   [1913 Webster]