What is Unassigned?

Unassigned definition and meaning on Dictionary terms:
verb (used with object)

to give or allocate; allot: to assign rooms at a hotel.
to give out or announce as a task: to assign homework.
to appoint, as to a post or duty: to assign one to guard duty.
to designate; name; specify: to assign a day for a meeting.
to ascribe; attribute; bring forward: to assign a cause.
Law. to transfer: to assign a contract.
Military. to place permanently on duty with a unit or under a commander.