Meaning of “wise” - Learner’s Dictionary

wise

adjective uk us /waɪz/
DECISION

B1 A wise decision or action shows good judgment and is the right thing to do:

I think we've made a wise choice.
[ + to do sth ] It's always wise to see a doctor if you're worried about your health.
→ Opposite unwise
PERSON

B1 A wise person is able to use their knowledge and experience to make good decisions and give good advice.

be none the wiser informal

to still not understand something after someone has tried to explain it to you

wisely adverb

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