A condition in which a susceptible individual is more than usually liable to lose his or her balance or to experience vertigo (a sensation of rotation, or movement, of one's self (subjective vertigo) or of one's surroundings (objective vertigo) in any level).

The term is sometimes used erroneously as a synonym for "dizziness". Vertigo may result from diseases of the inner ear or it may be a result of disturbances of the vestibular centers or pathways in the central nervous system.