Webster's Revised Unabridged Dictionary · 1913

Sunny

Sunny , adjective

1.
Of or pertaining to the sun; proceeding from, or resembling the sun; hence, shining; bright; brilliant; radiant.
Sunny beams. — Spenser
Sunny locks. — Shakespeare
2.
Exposed to the rays of the sun; brightened or warmed by the direct rays of the sun; as, a sunny room; the sunny side of a hill.
Her blooming mountains and her sunny shores. — Addison
3.
Cheerful; genial; as, a sunny disposition.
My decayed fair A sunny look of his would soon repair. — Shakespeare

Sunny , noun

(Zoology) See Sunfish (b).