noun
The ability to move; capacity for movement.
(now chiefly literary) A tendency to sudden change; mutability, changeableness.
(military) The ability of a military unit to move or be transported to a new position.
(chiefly physics) The degree to which particles of a liquid or gas are in movement.
(chiefly sociology) The ability of people to move between different social levels or professional occupations.
noun
(UK, obsolete, slang, humorous) The mob; the common people or rabble.