noun · 8 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.
/kənˈvʌlʃən/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:K AH0 N V AH1 L SH AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
An intense, paroxysmal, involuntary muscular contraction.
Definition source: English Wiktionary via Wiktextract
Topics: medicine, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
An uncontrolled fit, as of laughter; a paroxysm.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
Violent turmoil.
Definition source: English Wiktionary via Wiktextract
Examples
Earthquakes and convulsions of nature shake Earth on a regular basis.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
Hysteric in nature.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
a physical disturbance such as an earthquake or upheaval
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.