The noun office has 7 senses (first 4 from tagged texts)
1. (62) office, business office -- (place of business where professional or clerical duties are performed; "he rented an office in the new building")
2. (24) agency, federal agency, government agency, bureau, office, authority -- (an administrative unit of government; "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority")
3. (6) function, office, part, role -- (the actions and activities assigned to or required or expected of a person or group; "the function of a teacher"; "the government must do its part"; "play its role")
4. (2) office, power -- ((of a government or government official) holding an office means being in power; "being in office already gives a candidate a great advantage"; "during his first year in office"; "during his first year in power"; "the power of the president")
5. office, office staff -- (professional or clerical workers in an office; "the whole office was late the morning of the blizzard")
6. office -- (a religious rite or service prescribed by ecclesiastical authorities; "the offices of the mass")
7. position, post, berth, office, spot, billet, place, situation -- (a job in an organization; "he occupied a post in the treasury")