1. One that produces, especially a person or organization that produces goods or services for sale. 2. One who supervises and controls the finances, creation, and public presentation of a play, film, program, or similar work. 3. A furnace that manufactures producer gas. 4.Ecology A photosynthetic green plant or chemosynthetic bacterium, constituting the first trophic level in a food chain; an autotrophic organism.