(a) The eating of any kind of standing vegetation by domestic livestock or wild animals. Sometimes limited to the eating of herbage in contrast with browsing. ( BCFT). (b) Used sometimes as a synonym of forage.
Grazing is the regular consumption of part of one organism without killing it by another organism. Grazing differs from predation because the organism being eaten is not killed, and it differs from the feeding of parasites by the fact that the two organisms do not stay together very long, nor is the grazer so limited in what it can eat.