- Cirrus Cloud
(1) A high-level cloud (16,000 feet/4900 m or more), composed of ice crystals and appearing in the form of white, delicate filaments or white or mostly white patches or narrow bands.
Cirrus clouds typically have a fibrous or hairlike appearance, and often are semi-transparent.
Thunderstorm anvils (the very top part) are a form of cirrus cloud, but most cirrus clouds are not associated with thunderstorms.
(2) A very high cloud composed of bands or patches of thin white, possibly fleecy-looking areas. Typical altitudes for this type of cloud is around seven miles (11.3 km).
(1) Cirriously, do you expect us to be afraid of wispy clouds? They're only cirrus!
(2) "That cloud looks cirrus," said Ed, confusing his words again. Meanwhile, the cloud continued minding its own business.