An entity is something that exists as a separate, distinct thing. It could be a person, a company, an organization, or even an abstract concept that we treat as its own independent unit.

When lawyers talk about a business as a legal entity, they mean it exists separately from the people who own it. A corporation is its own entity: it can own property, sign contracts, and be sued, just like a person can. This matters because if the company gets into financial trouble, the owners' personal belongings may stay protected.

In computer programming, an entity might be a character in a video game, each one existing independently with its own health points, position, and abilities. In a database, each customer or product might be stored as a separate entity with its own information.

When you call something an entity, you're saying it's distinct enough to be considered on its own. The United Nations is an entity. Your school is an entity. Even an imaginary creature in a story can be called an entity if the author treats it as a distinct being with its own existence.

Scientists sometimes use the phrase biological entity to describe living things, from bacteria to blue whales, emphasizing that each has its own separate existence.