Definition of lightheadedness in US English:

lightheadedness

noun

  • See lightheaded

    • ‘Less frequent side effects were hallucinations, dizziness, light-headedness, and nausea.’
    • ‘A knock to the head can cause symptoms such as loss of consciousness, light-headedness, dizziness, nausea, and sickness.’
    • ‘There were no associated headaches, dizziness, light-headedness, palpitations, or eye pain.’
    • ‘Alternatively, dizziness may be used to describe a swaying sensation, or a feeling of weakness, faintness, light-headedness or unsteadiness.’
    • ‘Dizziness, light-headedness, or fainting may occur, especially when you get up suddenly from a lying or sitting position.’