Sign or Symptom
dizziness Audio
diz·zi·ness [ diz-ee-ness ]
Subclass of:
Sensation Disorders
Definitions related to dizziness:
  • A condition in which the sensation of lightheadedness or a feeling of movement within the head occurs.
    ACC/AHA Clinical Data Terminology
    American College of Cardiology and American Heart Association , 2020
  • A sensation of lightheadedness, unsteadiness, turning, spinning or rocking.
    NCI
    U.S. National Cancer Institute, 2021
  • An imprecise term which may refer to a sense of spatial disorientation, motion of the environment, or lightheadedness.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • A disorder characterized by a disturbing sensation of lightheadedness, unsteadiness, giddiness, spinning or rocking.
    Common Terminology Criteria for Adverse Events
    U.S. National Institutes of Health, 2021
  • Dizziness is a term used to describe a range of sensations, such as feeling faint, woozy, weak or unsteady. Dizziness that creates the false sense that you or your surroundings are spinning or moving is called vertigo.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.