noun. a cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples.
1. Noun, singular or mass Cirrostratus clouds are usually large, thin and poorly defined, whereas cirrocumulus clouds are very easy to see from the ground. 2. Noun, plural Cirrostratus clouds can be difficult to see while cirrocumulus are denser and easy to spot; they look like high-flying cotton balls. 3. Verb, base form Clouds may be altocumulus or cirrocumulus if they form at higher altitudes, while those that form near the ground and remain small are cumulus humilis, or fair-weather cumulus clouds.