graze

Concise Oxford English Dictionary © 2008 Oxford University Press:
graze1

▶verb

• 1 (of cattle, sheep, etc.) eat grass in a field.

  ■ feed on (grass or grassland).

• 2 informal eat frequent snacks at irregular intervals.

• 3 informal, chiefly N. Amer. casually sample something.

– derivatives
grazer noun.

– origin OE grasian, from græs ‘grass’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
graze2

▶verb

• 1 scrape and break the skin on (part of the body).

• 2 touch or scrape lightly in passing.

▶noun a superficial injury caused by grazing the skin.

– origin C16: perh. a specific use of graze1.