Canvass n. : To sift; to strain; to examine thoroughly; to scrutinize; as, to canvass the votes cast at an election; to canvass a district with reference to its probable vote.

Canvass n. : To examine by discussion; to debate.

Canvass n. : To go trough, with personal solicitation or public addresses; as, to canvass a district for votes; to canvass a city for subscriptions.

Canvass v. i. : To search thoroughly; to engage in solicitation by traversing a district; as, to canvass for subscriptions or for votes; to canvass for a book, a publisher, or in behalf of a charity; -- commonly followed by for.

Canvass n. : Close inspection; careful review for verification; as, a canvass of votes.

Canvass n. : Examination in the way of discussion or debate.

Canvass n. : Search; exploration; solicitation; systematic effort to obtain votes, subscribers, etc.

Example:
How do i build a Canvass stretcher from scratch?

Taxonomy
candidate, election, canvasser, GOTV, volunteer, Labour, free encyclopedia, doors, persuasion, general election, meet the candidate, Labour supporters, Labour voters, knock on, election day, Democratic candidate, an Election, population.

Defination from the web:
canvass is to turn out voters on election day for a Democratic candidate then knocking on Republican doors may not ... A field canvass can also guarantee completeness as each house can be accounted for. ...