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

LACKING definition: 1. If something that you need is lacking, you do not have enough of it: 2. to not have a quality…. Learn more.

LACKING definition: being without; not having; wanting; less. See examples of lacking used in a sentence.

If something or someone is lacking in a particular quality, they do not have any of it or enough of it. ...if your hair is lacking in lustre and feeling dry.

Definition of lacking adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. To be missing or deficient: We suspected that he was lying, but proof was lacking. 2. To be in need of something: She does not lack for friends.

Jan 20, 2026 · Adjective lacking (comparative more lacking, superlative most lacking) Missing or not having enough of (a good quality, etc).

lack•ing (lak′ ing), prep. being without; not having; wanting; less: Lacking equipment, the laboratory couldn't undertake the research project. adj. wanting; deficient: He was found lacking in stamina.

If something's lacking, there's not enough of it. Your new house may be lacking when it comes to comfortable chairs, leading your friends to lounge on the floor instead.

Synonyms for LACKING: insufficient, scarce, inadequate, low, deficient, short, wanting, unacceptable; Antonyms of LACKING: adequate, sufficient, enough, abundant, ample, plentiful, generous, liberal