What does the word mobility mean?

Usage examples for mobility

  1. The face was clean shaven, dark, and strong; thick hair, straight yet bushy, was slightly unkempt; it was streaked with grey; and an unexpected mobility when he smiled ran over the features that he seemed to hold rigid by deliberate effort. – Four Weird Tales by Algernon Blackwood
  2. It is like an admirably drilled army, where there is the nice balance of freedom and discipline that gives mobility without confusion; the divisions, down to files and even units, can be disposed along the line of battle wherever needed, or can be marshaled in reserve for use at the proper moment. – The Grain Of Dust A Novel by David Graham Phillips
  3. Capital, its mobility indefinitely increased by the improved technique of exchange, became essentially a citizen of the world. – The Open Secret of Ireland by T. M. Kettle
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