/kay'seuh dee"euh/ ; Sp. /ke'sah dhee"yah/ , n. , pl. quesadillas /-dee"euhz/ ; Sp. /-dhee"yahs/ . Mexican Cookery.
a tortilla folded over a filling of shredded cheese, onions, and chilies and broiled or fried.
[ 1940-45; quesad ( a ) ( ques ( o ) cheese ( caseus; cf. CHEESE 1 ) + -ada -ADE 1 ) + -illa dim. suffix ]