convulsions Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. 1 an abnormal strong and uncontrollable muscle seizure; 2 a violent disturbance. Example Sentence The wrong medicine caused convulsions in the patient. Synonyms muscle spasm; seizure; tremor Antonyms calm Hear It! Say It! Write It! convulsions Switch to cursive Start Share with your friends: