See also: rast, Rast, rásť, and raşt English Noun RAST (countable and uncountable, plural RASTs) (medicine) Acronym of radioallergosorbent test. Anagrams tars, sart, ARTS, arts., 'rats, tsar, tars-, ARTs, rats, Sart, srat, Srta., star, RATs, Arts, stra., Srta, arts, astr-, TSRA, RTAs, Star, TRAsWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads