[1] : The Collaborative International Dictionary of English v.0.48

proposal \propos"al\, n. from propose.
   1. that which is proposed, or propounded for consideration or
      acceptance; a scheme or design; terms or conditions
      proposed; offer; as, to make proposals for a treaty of
      peace; to offer proposals for erecting a building; to make
      proposals of marriage. "to put forth proposals for a
      book." --macaulay.
      1913 webster

   2. law the offer by a party of what he has in view as to an
      intended business transaction, which, with acceptance,
      constitutes a contract.
      1913 webster

   syn: proffer; tender; overture. see proposition.
        1913 webster
see also:
propose proposition 

[2] : WordNet (r) 2.0

proposal
     n 1: something proposed such as a plan or assumption
     2: an offer of marriage syn: marriage proposal, proposal of
        marriage, marriage offer
     3: the act of making a proposal; "they listened to her
        proposal" syn: proposition
see also:
marriage proposal proposal of marriage marriage offer proposition 

[3] : Moby Thesaurus II by Grady Ward, 1.0

83 moby thesaurus words for "proposal":
   admonition, advice, advising, advocacy, aim, ambition, animus,
   aspiration, bid, briefing, caution, caveat, consultation, council,
   counsel, desideration, desideratum, design, designation, desire,
   determination, direction, draft, effect, engagement, exhortation,
   expostulation, fixed purpose, function, game plan, guidance,
   hortation, idea, improper suggestion, indecent proposal, instance,
   instruction, intendment, intent, intention, invitation, layout,
   marriage proposal, meaning, mind, monition, motion, motive, naming,
   nisus, nomination, offer, offer of marriage, opinion, outline,
   parley, pass, plan, point, presentation, proffer, project,
   projection, proposition, prospectus, purpose, recommendation,
   remonstrance, request, resolution, resolve, sake, scenario, scheme,
   sexual advance, striving, study, suggestion, tender, thought, view,
   warning, will

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

proposal. an offer for consideration or acceptance. 
     2. it is a general rule that a proposal offered to another for 
acceptance may be withdrawn at any time before it is accepted, provided that 
notice of the withdrawal be given to the party to whom it was made. a bid 
q.v. may be withdrawn at any time before acceptance; and a proposal by 
letter may be withdrawn at any time before, acceptance 1 pick. 278; and, if 
accepted, it must be, in the very terms offered. 3 wheat. 225. vide bid; 
correspondence; letter; offer. 

Proposal >> P Words
Proposal, definition of term: Proposal
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