Learner's definition of IMPORTANT
[more important; most important]
1 : having serious meaning or worth: deserving or requiring serious attention
an important problem
In his editorial, he made several important points.
It's important that you remember to send these forms on time. = It's important for you to remember to send these forms on time.
Scientists have made an important discovery.
Doing her job well is important to her.
The new policy will help businesses and, more important [=importantly], it will create thousands of new jobs. [=it is more important that the new policy will create thousands of new jobs]
2 : having power, authority, or influence