"one who pastures cattle for market," late 13c. as a surname, agent noun from graze (v.1).
Entries linking to grazier
graze v.1
"to feed on grass," Old English grasian, from græs "grass" (see grass). Compare Middle Dutch, Middle High German grasen, Dutch grazen, German grasen. Transitive sense from 1560s. Figurative use by 1570s. Related: Grazed; grazing.