[1] : The Collaborative International Dictionary of English v.0.48

sunny \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.
      1913 webster

   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.
      1913 webster

            her blooming mountains and her sunny shores.
                                                  --addison.
      1913 webster

   3. cheerful; genial; as, a sunny disposition.
      1913 webster

            my decayed fair
            a sunny look of his would soon repair. --shak.
      1913 webster
see also:
sunnier sunniest 

[2] : WordNet (r) 2.0

sunny
     adj 1: abounding with sunlight; "a bright sunny day"; "one shining
            norming"- john muir; "when it is warm and shiny" syn:
             bright, shining, shiny, sunshiny
     2: bright and pleasant; promoting a feeling of cheer; "a cheery
        hello"; "a gay sunny room"; "a sunny smile" syn: cheery,
         gay
     also: sunniest, sunnier
see also:
bright shining shiny sunshiny cheery gay 
sunniest sunnier 

[3] : WordNet (r) 2.0

sunnier
     see sunny
see also:
sunny 

Sunnier >> S Words
Sunnier, definition of term: Sunnier
sunnier_pag1.html