/ ˈkɑːdɪgən; NAmE ˈkɑːrd-/ ( NAmE also ˌcardigan ˈsweater ) noun
a knitted jacket made of wool, usually with no collar and fastened with buttons at the front
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WORD ORIGIN
mid 19th cent. (Crimean War): named after James Thomas Brudenel, 7th Earl of Cardigan (1797–1868), leader of the Charge of the Light Brigade, whose troops first wore such garments.