Cirrus may refer to:

Science

* Cirrus (biology), any of various thin, thread-like structures on the body of an animal * Cirrus (botany), a tendril * Infrared cirrus, in astronomy, filamentary structures seen in infrared light * Cirrus cloud, a type of cloud

Aviation

* Cirrus aero engines, a series of British aircraft engines manufactured by various companies from the 1920s to the 1950s * Cirrus Aircraft, an aircraft manufacturer in Duluth, Minnesota, USA * Cirrus Airlines, a defunct regional airline in Hallbergmoos, Germany * Cirrus (rocket), a German research rocket first launched in 1961 * Schempp-Hirth Cirrus, an Open-class sailplane * Schempp-Hirth Standard Cirrus, a Standard-class sailplane * Swing Cirrus, a German paraglider design

* ''Cirrus'' (album), a 1974 release by Bobby Hutcherson * Cirrus (band), an American electronica duo * "Cirrus" (song), a 2013 instrumental by DJ Bonobo *"Cirrus", a 1996 song by Joe Morris from '' Elsewhere'' * "Cirrus Minor" (song), a 1969 song by Pink Floyd

* Chrysler Cirrus, a car produced by DaimlerChrysler between 1995 and 2000 * Cirrus (drug), a medication that contains pseudoephedrine and cetirizine * Cirrus (Helsinki building), a high-rise apartment building in Helsinki, Finland * Cirrus (Seattle building), a residential skyscraper in Seattle, Washington, USA * Cirrus (interbank network), an automated teller machine (ATM) network owned by MasterCard * Cirrus Logic, a semiconductor manufacturer * Access Database Engine, former versions of which were known as Microsoft Jet Database Engine and codenamed Cirrus * Cirrus Vodka, a vodka made in Richmond, Virginia, USA * Cirrus Mountain, a mountain in Alberta * Mount Cirrus. a mountain in Colorado {{Disambiguation