definition of
nutrition

[1] #1 nutrition n. (physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance. wn

[2] #2 nutrition n. [nutriment, nourishment, sustenance, aliment, alimentation, victuals] a source of materials to nourish the body. wn

[3] #3 nutrition n. the scientific study of food and drink (especially in humans). wn