1. Someone who is responsible for the care and upkeep of animals; a games warden: Only the keeper was allowed to be in the animal cages.
2. A person who is a guardian, custodian, or curator for objects: Helene was the keeper of the art collection for her uncle.
3. Custodian, protector, nurse, or a provider of care and supervision: Glenda ended up being her brother's keeper after he was seriously injured during an auto accident.