1. Capable of being moved; not fixed in place or condition; movable. Fixed or else mobile.
2. Characterised 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. 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. (Science: physiology) Capable of being moved, aroused, or excited; capable of spontaneous movement.
Origin: L. Mobilis, for movibilis, fr. Movere to move: cf. F. Mobile. See Move.