The Collaborative International Dictionary of English v.0.48:
Proposer \Pro*pos"er\, n. 1. One who proposes or offers anything for consideration or adoption. [1913 Webster] 2. A speaker; an orator. [Obs.] --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
proposer n 1: someone who advances a suggestion or proposal; "the suggester of this absurd strategy was a fool" [syn: suggester, proposer] 2: (parliamentary procedure) someone who makes a formal motion [syn: proposer, mover]