canvassing can‧vas‧sing [ˈkænvəsɪŋ] noun [uncountable]
1. MARKETING the activity of asking people about something in order to get their opinion or to get information:

• Members of the Finance Houses Association should discourage intrusive methods of canvassing.

ˌcold ˈcanvassing MARKETING
canvassing in which people are visited without being telephoned or warned in advance:

• a very cost effective method of selling that eliminates a lot of cold canvassing by salespeople

2. the activity of trying to persuade people to support someone or something:

• The election candidates have to learn the art of doorstep canvassing (= visiting people's houses to get their support ) .

Financial and business terms. 2012.