noun

1. any substance taken into and assimilated by a plant or animal to keep it alive and enable it to grow and repair tissue; nourishment; nutriment
2. solid substances of this sort
3. a specified kind of food
4. anything that nourishes or stimulates; whatever helps something to keep active, grow, etc. food for thought

Etymology: ME fode < OE foda < IE pāt-, to feed, eat < base *pā-, to pasture cattle > L pastor, pabulum, pascere, to feed, panis, bread

adjective

1. of or relating to food
2. used as food