Word forms: plural cleaners1. countable nounA cleaner is someone who is employed to clean the rooms and furniture inside a building.
2. countable noun [noun NOUN]A cleaner is someone whose job is to clean a particular type of thing.
He was a window cleaner.
3. variable noun [usually noun NOUN]A cleaner is a substance used for cleaning things.
...oven cleaner.
...abrasive cleaners.
4. countable noun [usually noun NOUN]A cleaner is a device used for cleaning things.
...an air cleaner.
5. See also pipe cleaner, vacuum cleaner
6. countable nounA cleaner or a cleaner's is a shop where things such as clothes are dry-cleaned.
7. See to take sb to the cleaners