Home›Browse›C›cirrus cloudcirrus cloudOur editors are putting together more complete content — check back in about 20 minutescirrus cloudcirrus cloud — nounnoun1. a thin, wispy cloud high in the sky, often made of ice crystals1.nounDefinitiona thin, wispy cloud high in the sky, often made of ice crystalsExampleHigh cirrus clouds often indicate that a change in weather is coming.