SUPERCOOL Meaning of SUPERCOOL in English v. & adj. --v. Chem. 1. tr. cool (a liquid) below its freezing-point without solidification or crystallization. 2 intr. (of a liquid) be cooled in this way. --adj. sl. very cool, relaxed, fine, etc. Oxford English vocab. Оксфордский английский словарь. 2012