Meaning of “important” - Learner’s Dictionary

important

adjective uk us /ɪmˈpɔːtənt/
VALUABLE

A1 valuable, useful, or necessary:

My family is very important to me.
[ + to do sth ] Listen, Donna has something important to say.
POWERFUL

B1 having a lot of power, influence, or effect:

an important person/decision
→ Opposite unimportant
importantly adverb

B2

They provided hot showers and, more importantly, clean clothes.

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