noun.
A proposal made as an alternative to another, earlier proposal.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a proposal offered as an alternative to an earlier proposal
Word Usage
"The owners bump up their offer of a $40 million cap to $42.5 million; the players counterproposal is for $49 million, which the league rejects out-of-hand."