noun
- A thin, white cloud formation occurring at high altitude, composed of ice crystals and often covering the entire sky in a uniform layer.
Usage: meteorology; usually uncountable
Examples
- The cirrostratus clouds created a halo effect around the sun.
- Meteorologists observed a sheet of cirrostratus at 20,000 feet.
- The sky was covered with thin cirrostratus, giving it a milky appearance.
- Cirrostratus clouds often indicate that rain may arrive within 24 hours.
- From the airplane window, we could see the cirrostratus layer below us.