Meaning of "may" in Essential English Dictionary

may

verb uk /meɪ/

A2 used to talk about what is possibly true or will possibly happen:

There may be other problems that we don’t know about.
I think I may have a cold.

B1 formal used when you ask if you can do something or say that someone can do something:

May I be excused, please?
You may begin.

(Definition of “may verb” from the Cambridge Essential Dictionary © Cambridge University Press)