Meaning of “lack” - Learner’s Dictionary

lack

verb us uk /læk/
Extra Examples
I felt that he lacked the necessary skills for the job.The performance lacked a bit of sparkle.As a leader, he lacked vision.I knew I lacked experience.He lacked the courage to call her.

B2 [ T ] to not have something, or not have enough of something:

She really lacks confidence.
be lacking

If something that you need is lacking, you do not have enough of it:

Enthusiasm has been sadly lacking these past few months at work.
be lacking in sth

to not have a quality:

He's totally lacking in charm of any sort.

(Definition of “lack verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)