De*vel"op*er, n. One that develops; specif.: (a) (Photog.) A chemical bath or reagent used in developing photographs. (b) (Dyeing) A reagent used to produce an ingrain color by its action upon some substance on the fiber.

De*vel"op*er (?), n. 1. One who, or that which, develops.

2. (Photog.) A reagent by the action of which the latent image upon a photographic plate, after exposure in the camera, or otherwise, is developed and visible.

De*vel"op*er, n. One that develops; specif.: (a) (Photog.) A chemical bath or reagent used in developing photographs. (b) (Dyeing) A reagent used to produce an ingrain color by its action upon some substance on the fiber.

• A person who is engaged in making something new or something existing better.
  
• (optionally with real estate) A person or company who prepares a parcel of land for sale, or creates structures on that land.
  
• (optionally with film) A person who uses chemicals to create photographs from photograph negatives.
  
• (optionally with software) A person who creates or modifies computer software.
  
• A liquid used in the processing of traditional photos.