Source : Webster's Revised Unabridged Dictionary (1913)

Mobile \Mo"bile\, a. [L. mobilis, for movibilis, fr. movere to
   move: cf. F. mobile. See {Move}.]
   1. Capable of being moved; not fixed in place or condition;
      movable. ``Fixed or else mobile.'' --Skelton.

   2. Characterized by an extreme degree of fluidity; moving or
      flowing with great freedom; as, benzine and mercury are
      mobile liquids; -- opposed to viscous, viscoidal, or oily.

   3. Easily moved in feeling, purpose, or direction; excitable;
      changeable; fickle. --Testament of Love.

            The quick and mobile curiosity of her disposition.
                                                  --Hawthorne.

   4. Changing in appearance and expression under the influence
      of the mind; as, mobile features.

   5. (Physiol.) Capable of being moved, aroused, or excited;
      capable of spontaneous movement.

Mobile \Mo"bile\, n. [L. mobile vulgus. See {Mobile}, a., and
   cf. 3d {Mob}.]
   The mob; the populace. [Obs.] ``The unthinking mobile.''
   --South.

Source : WordNet®

Mobile
     n 1: a river in southwestern Alabama; flows into Mobile Bay [syn:
           {Mobile River}]
     2: a port in southwestern Alabama on Mobile Bay
     3: sculpture suspended in midair whose delicately balanced
        parts can be set in motion by air currents [ant: {stabile}]