Overcast with clouds; obscured by clouds: as, a cloudy day; a cloudy sky.Consisting of a cloud or clouds; of the nature of a cloud.Obscure; dark; not easily understood.Having the appearance of gloom; indicating gloom, anxiety, sullenness, or ill nature; not open or cheerful.Marked with spots or areas of dark or various hues, or by clouding or a blending of light and shade or of colors.Wanting in luster, brightness, transparency, or clearness; dimmed: as, a cloudy diamond.