(poetic) Serenity; clearness; calmness.
A fine rain from a cloudless sky after sunset.
(transitive) To make serene.
Calm, peaceful, unruffled.
Without worry or anxiety; unaffected by disturbance.
(archaic) Fair and unclouded (as of the sky); clear; unobscured.
Used as part of certain titles, originally to indicate sovereignty or independence.