office (n.) Look up office at Dictionary.com
mid-13c., "a post, an employment to which certain duties are attached," from Anglo-French and Old French ofice "place or function; divine service" (12c. in Old French) or directly from Latin officium "service, kindness, favor; official duty, function, business; ceremonial observance" (in Church Latin, "church service"), literally "work-doing," from ops (genitive opis) "power, might, abundance, means" (related to opus "work," from PIE root *op- "to work, produce in abundance") + combining form of facere "to make, to do" (from PIE root *dhe- "to set, put"). Meaning "place for conducting business" first recorded 1560s. Office hours attested from 1841.