1.sculpture suspended in midair whose delicately balanced parts can be set in motion by air currents
2.moving or capable of moving readily (especially from place to place);
a mobile missile system
3.(of groups of people) tending to travel and change settlements frequently;
a restless mobile society
4.having transportation available
5.capable of changing quickly from one state or condition to another;
a highly mobile face
6.affording change (especially in social status);
Britain is not a truly fluid society