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English definition of “lack”

lack

noun uk   /læk/ us  
lack of sth B1 the fact that something is not available or that there is not enough of it: Her only problem is a lack of confidence. Lack of sleep had made him irritable. If he fails it won't be for/through lack of effort (= he has certainly tried). We won't be going on holiday this year - lack of funds, I'm afraid.

lack

verb [T] uk   /læk/ us  
B2 to not have or not have enough of something that is needed or wanted: He just lacks a little confidence. What we lack in this house is space to store things. We are lacking three members of staff due to illness.
(Definition of lack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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