Pro*mot"er (?), n. 1. One who, or that which, forwards, advances, or promotes; an encourager; as, a promoter of charity or philosophy. Boyle.

2. Specifically, one who sets on foot, and takes the preliminary steps in, a scheme for the organization of a corporation, a joint-stock company, or the like.

3. One who excites; as, a promoter of sedition.

4. An informer; a makebate. [Obs.] Tusser.

• the section of DNA that controls the initiation of RNA transcription as a product of a gene
  
• the person who makes arrangements and typically deals with financial compensation for one or more parties to an entertainment event
  
• an accelerator of catalysis, though itself is not a catalyst.