1.One who, or that which, develops.
2.(Photog.) A chemical bath or reagent used in developing photographs. Note: By the action of the developer, the latent image on a photographic plate or film, not perceptible to the eye after exposure in the camera, is developed and becomes visible.
3.(Dyeing) A reagent used to produce an ingrain color by its action upon some substance on the fiber.
4.A corporation or individual who finances or organizes a real estate development (5).
