sunnyPronunciation: /ˈsʌni/Translate sunny | into French | into German | into Italian | into Spanish Definition of sunny adjective (sunnier, sunniest) bright with sunlight:a sunny day (of a place) receiving much sunlight:Seefeld is set high on a sunny plateau (of a person or their temperament) cheery and bright:he had a sunny dispositionPhrases sunny side up North American (of an egg) fried on one side only: I ate a couple of eggs sunny side upDerivatives sunnily adverb sunniness noun sunny in other Oxford dictionaries Definition of sunny in the US English dictionary