Origin: 1500–10; orig. spelling variant of canvas, as a v.; sense “discuss” apparently development of the earlier senses “toss in a canvas sheet,” “harshly criticize”; sense “solicit votes” obscurely derived
to determine the feelings and opinions of (voters before an election, etc), esp by conducting a survey
3.
to investigate (something) thoroughly, esp by discussion or debate
4.
chiefly (US) to inspect (votes) officially to determine their validity
—n
5.
a solicitation of opinions, votes, sales orders, etc
6.
close inspection; scrutiny
[C16: probably from obsolete sense of canvas (to toss someone in a canvas sheet, hence, to harass, criticize); the development of current senses is unexplained]