Mobile  —adj. 1 movable; able to move easily or get out and about. 2 (of the face etc.) Readily changing its expression. 3 (of a shop etc.) Accommodated in a vehicle so as to serve various places. 4 (of a person) able to change his or her social status. —n. Decoration that may be hung so as to turn freely.  mobility n. [latin moveo move]