Standard Lemma guide

lightheadedness

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • lītʹhĕd'(ĭ)d-nĕs
  • CMU ARPABET: L AY1 T HH EH2 D AH0 D N AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The state or quality of being light-headed; dizziness or faintness; flightiness; wandering; delirium.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Examples

  • The lightheadedness passed once I lay down.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a frivolous lack of prudence

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: heedlessness, mindlessness, rashness

3

noun

Meaning 3

a reeling sensation; a feeling that you are about to fall

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: dizziness, giddiness, vertigo

Antonyms: none provided

Broader terms: symptom

History

Etymology

From light-headed (adjective) (any sense) + -ness (suffix forming nouns).

Across languages

Translations

3 source translations are retained for this English entry.

  • German: Benommenheit — the property of feeling lighheaded
  • Greek: λιποθυμία (lipothymía) — the property of feeling lighheaded
  • Irish: aerthacht — the property of feeling lighheaded