sour /ˈsauə/ adj. 1.酸的，酸味的：a sour smell 酸臭味This milk has turned sour. 这牛奶发酸了。 The fruit tastes sour. 这水果吃起来很酸。 2.易怒的，乖张的：a sour temper 乖戾的脾气；a sour face 愠怒的面孔