stuffstuffstuffsstuffedstuffing2verb (stuffs, stuffing, stuffed)1to fill something with something: The pillow was stuffed with feathers.2(informal) to push something quickly into another thing: He took the money quickly and stuffed it into his pocket.stuffstuff1noun (no plural) (informal)any material, substance or group of things: What's this blue stuff on the carpet? Put your stuff in this bag.