To feed on growing grass and pasturage, as do cattle, sheep, etc. The cows graze in the meadow all day long.
To touch or scrape lightly in passing. The bullet grazed his shoulder, leaving a shallow wound.
To eat small portions of food throughout the day. She prefers to graze rather than have three large meals.
To cause (livestock) to feed on grass in a particular area; to pasture. They graze their sheep on the common land.