bluejeancommon nounEtymologyexpandfrom English blue jeans (jean), itself derived from French bleu de gênes, a dye used to color 'serge de nîmes' (denim).Definition1. Clothing, most often trousers, made of blue jeans or denim.expandPluralbluejeansTranslationsenglish:blue jeansjapanese:ブルージーンズSee alsoblue jean (cn.)