Oxford Dictionary English seize up phrasal verbphrasal verb Add to my wordlistjump to other resultsPhrasal Verbsseize up (North American English also seize) Add to my wordlistjump to other results1(of the parts of a machine) to stop moving or working correctly The engine suddenly seized up.2if a part of your body seizes up, you are unable to move it easily and it is often painful oxfordlearnersdictionaries.com
