department

noun

1. 1

   A part, portion, or subdivision.

2. 2

   A distinct course of life, action, study, or the like.

   “Technical things are not his department; he's a people person.”

3. 3

   A subdivision of an organization.

4. 4

   A territorial division; a district; especially, in France, one of the districts into which the country is divided for governmental purposes, similar to a county in the UK and in the USA. France is composed of 101 départements organized in 18 régions, each department is divided into arrondissements, in turn divided into cantons.

5. 5

   A military subdivision of a country

   “the Department of the Potomac”

6. 6

   Act of departing; departure.