1. [adj]  bright and pleasant; promoting a feeling of cheer; "a cheery hello"; "a gay sunny room"; "a sunny smile"
2. [adj]  abounding with sunlight; "a bright sunny day"; "one shining norming"- John Muir; "when it is warm and shiny"

Sunny
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1. \Sun"ny\, a. [Compar. {Sunnier}; superl. {Sunniest}.]
   1. Of or pertaining to the sun; proceeding from, or
      resembling the sun; hence, shining; bright; brilliant;
      radiant. ``Sunny beams.'' --Spenser. ``Sunny locks.''
      --Shak.
   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.                               --Shak.
   

2. \Sun"ny\, n. (Zo["o]l.)
   See {Sunfish}
   (b) .