Definition of sunny

• superl. - Of or pertaining to the sun; proceeding from, or resembling the sun; hence, shining; bright; brilliant; radiant.
• superl. - 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.
• superl. - Cheerful; genial; as, a sunny disposition.
• n. - See Sunfish (b).