- Vertigo is a feeling of movement, a sensation as if the external world were revolving around the patient (objective vertigo) or as if he himself were revolving in space (subjective vertigo). Vertigo is medically distinct from dizziness, lightheadedness, and unsteadiness.
Definition from: NCI Thesaurus via Unified Medical Language System at the National Library of Medicine
- A disordered state which is associated with various disorders (as of the inner ear) and in which the individual or the individual's surroundings seem to whirl dizzily.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.