cloudiness noun3 •Of the sky, weather, etc.: the state of being cloudy.Expect considerable cloudiness with occasional rain showers. •Of a liquid: the property of being murky.Cloudiness in the water is most often caused in new aquariums by white bacteria. •(figurative) Of information, a writing style, etc.: the property of being obscure.Avoid cloudiness in your essay-writing. formscloudinesses