Definition of departments:
(n) :
A subdivision of an organization.
(n) :
(often in proper names) One of the principal divisions of executive government
(n) :
(in a university) One of the divisions of instructions
(n) :
A part, portion, or subdivision.
(n) :
A distinct course of life, action, study, or the like.
(n) :
A specified aspect or quality.