A person who grooms animals.
A brush used to groom horses.
An animal that grooms another (the groomee).
A tool used to trim a person's hair.
A person employed to clean the inside of an airplane between flights.
(uncommon) A person who cares for their personal appearance and hygiene (grooming).
(colloquial) One who grooms, or attempts to gain the trust of a minor etc. in order to exploit them.
(derogatory, offensive, right-wing usage) An LGBT person or drag queen who exists near children, or any other person who makes children aware of LGBT people or drag, from the perspective of people who consider this to be sexual. (This is a hot sense, kept provisionally)
(skiing, slang) A piste serviced by snow groomers.