The word objective means any of several things:

• It has several dictionary definitions, such as goal or fair. See project objective, design objective, and Wiktionary:Objective.
• In philosophy, it can refer to the nature of an object or reality. See object (philosophy), Objectivism, objectivity, objective truth.
• In grammar, it can refer to nouns that are the object of a sentence. See object (grammar).
• It can also refer to the lens or lens system in a microscope or camera that receives light and forms an image. See objective lens and photographic lens.
• Objective-C, a programming language.

The opposite of objective is subjective.