The meaning of LACK is to be deficient or missing. How to use lack in a sentence.

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LACK definition: an absence or inadequate amount of something needed, desirable, or customary. See examples of lack used in a sentence.

LACK definition: 1. the fact that something is not available or that there is not enough of it: 2. to not have or…. Learn more.

lack (læk) n. 1. deficiency or absence of something needed or desirable: lack of money; lack of skill. 2. something missing or wanted: After he left, they really felt the lack.

If there is a lack of something, there is not enough of it or it does not exist at all.

Definition of lack noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Lack means to be without or to have less than a desirable quantity of something: to lack courage, sufficient money, enough members to make a quorum. Want may imply some urgency in fulfilling a …

Jan 20, 2026 · lack (third-person singular simple present lacks, present participle lacking, simple past and past participle lacked) (transitive, stative) To be without, not to have, to need, to require.

A particular deficiency or absence. Owing to a lack of supporters, the reforms did not succeed.