Meaning of “issue” - Learner’s Dictionary

issue

noun uk us /ˈɪʃuː/
PROBLEM [ C ]

B1 an important subject or problem that people are discussing:

the issues of race and social class
political issues
Chris has raised a very important issue.
NEWSPAPER OR MAGAZINE [ C ]

B2 the newspaper, magazine, etc that is produced on a particular day:

Have you seen the latest issue of Computer World?
at issue

most important in what is being discussed:

The point at issue is what is best for the child.
take issue (with sb/sth)

to disagree with what someone says or writes:

I would take issue with you on that.

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