Definition: The word "aquarium" comes from a Latin phrase meaning "to fill with water." It's also used in the Bible to refer to a container, particularly one that holds fish. The term means a place for animals or plants to live in captivity, which is quite common among animal lovers. In more general terms, it describes a living space where something of value is kept, typically under controlled conditions. To give you a sense of the broader use and definition of "aquarium," consider how a fish tank is an aquarium—a container used for keeping animals or plants in captivity—often designed to simulate natural habitats or environmental settings.