Available Definitions:
1) a. - Bright; clear; unabscured; as, a serene sky.
2) a. - Calm; placid; undisturbed; unruffled; as, a serene aspect; a serene soul.
3) n. - Serenity; clearness; calmness.
4) n. - Evening air; night chill.
5) v. t. - To make serene.