"lacks" in the noun sense
1. lack, deficiency, want
the state of needing something that is absent or unavailable
"there is a serious lack of insight into the problem"
"water is the critical deficiency in desert regions"
"for want of a nail the shoe was lost"
"lacks" in the verb sense
1. miss, lack
"This soup lacks salt"
"There is something missing in my jewelry box!"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License