Feed  —v. (past and past part. Fed) 1 a supply with food. B put food into the mouth of. 2 give as food, esp. To animals. 3 (usu. Foll. By on) (esp. Of animals, or colloq. Of people) eat. 4 (often foll. By on) nourish or be nourished by; benefit from. 5 a keep (a fire, machine, etc.) Supplied with fuel etc. B (foll. By into) supply (material) to a machine etc. C (often foll. By into) (of a river etc.) Flow into a lake etc. D keep (a meter) supplied with coins to ensure continuity. 6 slang supply (an actor etc.) With cues. 7 sport send passes to (a player). 8 gratify (vanity etc.). 9 provide (advice, information, etc.) To. —n. 1 food, esp. For animals or infants. 2 feeding; giving of food. 3 colloq. Meal. 4 a raw material for a machine etc. B provision of or device for this.  feed back produce feedback. Feed up fatten. [old english]