Act
of departing; departure.
A part, portion, or subdivision.
A distinct course of life, action, study,
or the like; appointed sphere or walk; province.
Subdivision of business or official duty;
especially, one of the principal divisions of executive government;
as, the treasury department; the war department; also,
in a university, one of the divisions of instruction; as, the medical
department; the department of physics.
A territorial division; a district; esp.,
in France, one of the districts composed of several arrondissements
into which the country is divided for governmental purposes; as, the
Department of the Loire.
A military subdivision of a country; as,
the Department of the Potomac.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
