Unsteadiness: Loss of one's equilibrium in regard to the environment, often with a feeling of almost falling, or the result of bumping into things.
There are many causes for unsteadiness, including problems in the cerebral or cerebellar portions of the brain, the spinal cord, vestibular system, or inner ear. Unsteadiness is medically distinct from dizziness, lightheadedness, and vertigo.
See also dizziness, lightheadedness, vertigo.
