Meaning of “strange” - Learner’s Dictionary

strange

adjective uk us /streɪndʒ/
UNEXPECTED

A2 If something is strange, it is surprising because it is unusual or unexpected:

[ + (that) ] It's strange that she hasn't called.
It's midnight and he's still at work - that's strange.
What a strange-looking man.
NOT FAMILIAR

B1 A strange person or place is one that you are not familiar with:

I was stuck in a strange town with no money.
strangely adverb

B2

She's been behaving very strangely (= in an unusual way) recently.

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