1. One that produces, especially a person or organization that produces goods or services for sale.

2. A person who supervises and controls the administrative, financial, and commercial aspects of staging a show or performance or of creating and distributing a video or audio recording.

3. A furnace that manufactures producer gas.

4. Ecology An organism, such as a green plant, that produces its own food through photosynthesis or chemosynthesis and constitutes the first trophic level in a food chain; an autotroph.