clear up /klɪəˈɹʌp/verb 6clear-up noun 1forms 4 verb6 •(UK) To clean up. •To depart or disappear.All of their symptoms cleared up after the mold was removed. •To become free of certain blemishes.With the new cleanser, his skin cleared up in two weeks.His lung X-rays cleared up after they moved to Arizona. •Of stormy weather, to dissipate, to become calm.Advise him to stay a little longer till the weather clears up. — 1731 •To clarify, to correct a misconception. •To pot all of the remaining balls in a single turn. clear-up noun1 •The act of clearing up formscleared up · clearing up · clears up · clear-ups