plein-air (plān-ârˈ, Fr. plĕn-ĕrˈ) [key] [Fr., = open-air], term used for paintings or drawings made directly from nature and infused with a feeling of the open air. Painting outdoors is a relatively recent practice; the impressionists and the painters of the Barbizon school made plein-air painting an important dimension of their landscape work.
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