a person, company, or country that makes, grows, or supplies goods or commodities for sale

an oil producer

the firm is the country's biggest producer of fresh eggs

a person responsible for the financial and managerial aspects of the making of a film or broadcast or for staging a play, opera, etc.

a film producer

he's the executive producer of weekday daytime shows

an organism that produces organic compounds from simple substances such as water and carbon dioxide; an autotroph

producers begin food chains which feed all life