Meaning of “superficial” - Learner’s Dictionary

superficial

adjective uk us /ˌsuːpəˈfɪʃəl/
NOT SERIOUS

If someone is superficial, they never think about things that are serious or important.

NOT COMPLETE

not complete and involving only the most obvious things:

superficial knowledge
a superficial resemblance
NOT DEEP

only on the surface of something:

superficial damage/injuries
superficially adverb

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