Ability to move spontaneously and independently

• A change of position that does not entail a change of location

WordNet Word definitions in WordNet
n. ability to move spontaneously and independently [ant: immotility ] a change of position that does not entail a change of location; "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; ...

Wiktionary Word definitions in Wiktionary
n. 1 (context uncountable English) The state of being motile 2 (context countable English) The degree to which something is motile

Wikipedia Word definitions in Wikipedia
In biology , motility is the ability to move spontaneously and actively, consuming energy in the process. Motility is genetically determined (see genetic determinism ) but may be affected by environmental factors. For instance, muscles give animals motility ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Motility \Mo*til"i*ty\, n. [Cf. F. motilit['e].] (Physiol.) Capability of motion; contractility.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"capacity of movement," 1827, from French motilité (1827), from Latin mot- , stem of movere "to move" (see move (v.)).