n.
1.the act of distributing things into classes or categories of the same type
2.a group of people or things arranged by class or category
3.the basic cognitive process of arranging into classes or categories
4.restriction imposed by the government on documents or weapons that are available only to certain authorized people
Idiom of the Day
see the handwriting on the wall
to know that something is certain to happen
We saw the handwriting on the wall and we knew that our company was going to go bankrupt.