classification
noun
1.
the act of distributing things into classes or categories of the same type
Derived from:
classify 2.
a group of people or things arranged by class or category
Derived from:
classify 3.
the basic cognitive process of arranging into classes or categories
Derived from:
classify 4.
restriction imposed by the government on documents or weapons that are available only to certain authorized people
Antonym:
declassification Derived from:
classify