: grasses and other plants that are eaten by animals (such as cows)
of an animal : to eat growing grass or other plants
: to search for something (such as food or supplies)
Vegetable food, including corn and hay, of wild or domestic animals. Harvested, processed, and stored forage is called silage. Forage should be harvested in early maturity to avoid a decrease in protein and fibre content as crops mature.
What made you want to look up forage? Please tell us where you read or heard it (including the quote, if possible).