convulsion

noun

con·​vul·​sion kən-ˈvəl-shən 

1

a

: an abnormal violent and involuntary contraction or series of contractions of the muscles

b

: seizure sense 2a

2

a

: a violent disturbance

b

: an uncontrolled fit : paroxysm

convulsionary

kən-ˈvəl-shə-ˌner-ē 

adjective

Synonyms of convulsion

• upheaval
• revolution
• unrest
• earthquake

Examples of convulsion in a Sentence

the Russian Revolution was one of the major convulsions of the 20th century

Recent Examples on the Web

The invasive form can include headache, stiff neck, confusion, balance loss and convulsions. — Eva Flowe october 15, Charlotte Observer, 15 Oct. 2026

Since the late nineteenth century, raw white-lead was known to pose a substantial health risk to those exposed to it, prompting symptoms such as swelling of the brain, epileptic convulsions, paralysis, severe colic, and death. — Wendy S. Walters, Architectural Digest, 12 Oct. 2026

In amphibians, chytridiomycosis causes a wide variety of symptoms including skin damage, red skin, convulsions, and eventually leads to heart failure. — Laura Baisas, Popular Science, 24 Sep. 2026

Signs of infection include high fever, headache, neck stiffness, disorientation, coma, convulsions, muscle weakness, vision loss and paralysis. — Esther Launstein, Cincinnati Enquirer, 27 Aug. 2026

Word History

First Known Use

1547, in the meaning defined at sense 1a

Rhymes for convulsion

• avulsion
• compulsion
• emulsion
• expulsion
• impulsion
• propulsion
• repulsion
• revulsion
• microemulsion

Kids Definition

convulsion

noun

con·​vul·​sion kən-ˈvəl-shən 

1

: an abnormal violent contraction or series of contractions of the muscles that is not under control of the will

2

: a violent disturbance

Medical Definition

convulsion

noun

con·​vul·​sion kən-ˈvəl-shən 

1

: an abnormal violent and involuntary contraction or series of contractions of the muscles

—often used in plural

a patient suffering from convulsions

2

: seizure sense 1