plein air
noun
the open air, especially the daylight of outdoors.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They are collectively known generally as impressionists, though the word "plein-airist" - luminist - has been chosen sometimes by them and by their admirers.
From The Galleries of the Exposition by Eugen Neuhaus