graze (v.1) Look up graze at Dictionary.com
"to feed," Old English grasian "to feed on grass," from græs "grass" (see grass). Compare Middle Dutch, Middle High German grasen, Dutch grazen, German grasen. Figurative use by 1570s. Related: Grazed; grazing.
graze (v.2) Look up graze at Dictionary.com
"to touch," c.1600, perhaps a transferred sense from graze (v.1) via a notion of cropping grass right down to the ground (compare German grasen "to feed on grass," used in military sense in reference to cannonballs that rebound off the ground). Related: Grazed; grazing. As a noun from 1690s.