Definition of en plein air in English:

en plein air

adverb

  • (chiefly with reference to painting) in the open air.

    ‘a group of works executed en plein air during the artist's stay in Rome’
    See also plein-air
    • ‘Many of the landscapes are painted en plein air where the subtleties of light and color are inspirations which are used to infuse the paintings with a unique sense of place and moment.’
    • ‘Like the artists of the Barbizon School who strongly influenced his work, he worked en plein air, developing a great familiarity with particular landscapes, before finishing his work in the studio.’
    open air, out-of-doors, outside, exterior, external
    View synonyms

Pronunciation:

en plein air

/ˌɒ̃ plɛn ˈɛː/