WordNet sense 1 (the setting for a narrative or fictional or dramatic account):

canvass

WordNet sense 2 (a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel):

sail, sheet

WordNet sense 3 (a tent made of canvas fabric):

canvas tent

WordNet sense 4 (a heavy, closely woven fabric (used for clothing or chairs or sails or tents)):

canvas fabric, canvass fabric

WordNet sense 5 (get the opinions (of people) by asking specific questions):

poll, poll

WordNet sense 6 (consider in detail and subject to an analysis in order to discover essential features or meaning):

analyze, examine, study, analyse