"things that you lack"
I think I have heard this expression in/on a television show.
I'd like to know if it actually exists, please.
If so, does it mean "things that you don't have"?
Re: "things that you lack"
I've just googled for this phrase. It seems that it is part of a song, at least I came across many lyrics containing this phrase.
You are right with your suggestion.
It means things that you don't have.
They continue to lack a certain warmth in commucation with other people.
The pupils were showing a lack of interest in this subject.