1. (a.) Bright; clear; unobscured; 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.

at peace bloodless bucolic calm clear cloudless collected composed concordant cool coolheaded diaphanous dispassionate easy easygoing equable even even-tempered halcyon idyllic imperturbable levelheaded light lightish lightsome lucent lucid luculent noiseless nonchalant orderly pacific pastoral peaceable peaceful peacetime pellucid philosophical piping placid poised quiescent quiet relucent reposeful restful resting self-possessed soft still temperate tranquil translucent translucid transparent unclouded undisturbed unexcitable unflappable unobscured unperturbed unruffled untroubled