From Longman Dictionary of Contemporary Englishcan openerˈcan ˌopener ●●○ noun [countable] 
DFUa tool for opening a can of food
DFUa tool for opening a can of foodExamples from the Corpus
can opener• A hat, a pot holder, a can opener.• When they had their breakfast Tam asked me if he could possibly have a lend of my can opener for their beans.• Earlier this evening he asked to borrow my new can opener.• Is a car bumper, but see this part is a removable can opener.• I realized I would have to stand firm about the can opener or risk losing my authority over Tam and Richie.• They were there because the can opener that came with the caravan was worn out.• She pulled out a can of soup, but the can opener was dead. 