He had resolved before actually starting upon his picture to make some plein air studies of the islanders.
His hopes became centred in a large painting, which he called plein air, intended for exhibition in the Salon.
All the members of the club were young—of the new rebellious school of 'plein air'—the afternoon promised to be amusing.
1894, from French phrase en plein air, literally "in the open air." The style developed among French impressionists c.1870.