A person who goes door-to-door or person-to-person to solicit opinions, gather information, or sell products.
From 'canvas' as a verb (meaning to solicit) + agent suffix '-er'. The verb sense developed from the French meaning 'to sift through' or 'scrutinize thoroughly'.
The word 'canvas' as a verb comes from the practice of sifting through linen scraps—canvassers metaphorically 'sift through' communities to find information!
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