lack·ing/`lækɪŋ; ˈlækɪŋ/ adj 1 be lacking in sth to not have something or not have enough of something 没有某物; 某物不足: His voice was completely lacking in emotion. 他的声音里不带一丝感情。 2 [not before noun 不用于名词前] not existing or available 不存在的; 得不到的: The information they need is lacking. 他们所需的资料无法获得。