adjective, sun·ni·er, sun·ni·est.

abounding in sunshine: a sunny day.
exposed to, lighted, or warmed by the direct rays of the sun: a sunny room.
pertaining to or proceeding from the sun; solar.
resembling the sun.
cheery, cheerful, or joyous: a sunny disposition.

Origin of sunny

1250–1300 Middle English; see sun, -y1
Related formssun·ni·ly, adverbsun·ni·ness, nounun·sun·ny, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sunny

Contemporary Examples of sunny

Historical Examples of sunny

  • What real worth might lie under this sunny surface the future must determine.

    Within the Law

    Marvin Dana

  • The mountains were turning purple, and a sunny mist lay all over the shores.

    Rico and Wiseli

    Johanna Spyri

  • "I mean it," he said, and he quoted the lines about Portia's sunny locks.

    The Foolish Lovers

    St. John G. Ervine

  • And her sunny locks Hang on her temples like a golden fleece.

    The Foolish Lovers

    St. John G. Ervine

  • The dismal Hecate did not much like the idea of going abroad into the sunny world.

    Tanglewood Tales

    Nathaniel Hawthorne

British Dictionary definitions for sunny


adjective -nier or -niest

full of or exposed to sunlight
radiating good humour
of or resembling the sun
Derived Formssunnily, adverbsunniness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sunny

"full of sun," c.1300, from sun (n.) + -y (2). Figurative sense of "cheerful" is attested from 1540s. Related: Sunnily; sunniness. Eggs served sunny side up first attested 1900.

Online Etymology Dictionary, © 2010 Douglas Harper