Shasta daisyPronunciation: /ˈʃastə/Definition of Shasta daisy noun a tall Pyrenean plant which bears a single large white daisy-like flower. Leucanthemum maximum or its hybrids, family Compositae Origin: mid 19th century: named after Mount Shasta in CaliforniaShasta daisy in other Oxford dictionaries Definition of Shasta daisy in the US English dictionary