addition是什么意思_addition的翻译_音标_读音_用法_例句_爱词霸在线词典 Noun 1 a component that is added to something to improve it; "the addition of a bathroom was a major improvement" "the addition of cinammon improved the flavor" 2 the act of adding one thing to another; "the addition of flowers created a pleasing effect" "the addition of a leap day every four years" 3 a quantity that is added;