cleaner UK /ˈkliː.nə/US /ˈkli.nɚ/ noun5 •a person whose job is to wash the floors, windows and rooms of a building •A substance used for cleaning; especially, one retailed for that purpose and meant for use on things other than one's own body. •[in the plural] A professional laundry or dry cleaner (business).I'll have to take this shirt to the cleaners. •A device that cleans, such as the vacuum cleaner. •(informal) A fixer; a person who disposes of bodies and evidence. formscleaners