• (n.) The act by which falsehood and forgery are proved; an action brought for the purpose of having some instrument declared false or forged. • (n.) The act of disapproving; disapprobation. Found on http://thinkexist.com/dictionary/meaning/improbation/
Im`pro·ba'tion noun [ Latin improbatio .] 1. The act of disapproving; disapprobation. 2. (Scots Law) The act by which falsehood and forgery are proved; an action brought for the purpose of having some instrument declared false or forged. Bell. Found on http://www.encyclo.co.uk/webster/I/24