a.

1. 重要的，重大的[（+to/for）]
   It is important to see that everything goes well.

   重要的是确保一切顺利。

   It is important to learn to communicate.

   学会沟通思想很重要。

2. 地位高的，有权力的
   He is an important official in the government.

   他是政府的要员。

3. 狂妄自大的
   He has an important air about him.

   他显得盛气凌人。

adj.

1. of great significance or value.
2. having high rank or status.