'Proposer' definitions:

Definition of 'proposer'

From: WordNet
noun
Someone who advances a suggestion or proposal; "the suggester of this absurd strategy was a fool" [syn: suggester, proposer]
noun
(parliamentary procedure) someone who makes a formal motion [syn: proposer, mover]

Definition of 'Proposer'

From: GCIDE
  • 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]