Other forms: keepers
A keeper is someone who is responsible for something, especially a property or a lot of animals. A keeper might take care of a big summer house during the winter months.
You can use keeper to mean "caretaker," someone whose job involves maintaining a house, farm, estate, or grounds. The keeper of a golf course might, for example, keep the greens tidy and groomed. It's also shorthand for zookeeper, or a person who cares for the animals in a zoo. Since about 1300, keeper has meant "one who has charge of some person or thing." It comes from keep and its Old English root cepan, "seize or hold."