An archaic or variant spelling of 'grocer'; a person who sells groceries or food provisions.
From Old French 'grossier,' meaning a merchant dealing in large quantities (from 'gros,' large). The modern spelling 'grocer' emerged, but 'groser' persists in some dialects or historical texts.
The word 'grocer' originally meant someone dealing in wholesale 'gross' quantities—whole shipments—not the retail shops we know today. How professions change! Modern grocers sell individually chosen items, but retained the wholesale-derived name.
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