any substance or matter that, taken into a living organism, serves to sustain it in its existence, promoting growth, replacing loss, and providing energy.

anything that nourishes; nourishment; food.

noun

aliment , bread , comestible , diet , edible , esculent , fare , foodstuff , meat , nourishment , nurture , nutrition , pabulum , pap , provender , provision , sustenance , victual , food , provisions , support