PLEIN-AIR Meaning of PLEIN-AIR in English plein-air BrE AmE ˌpleɪn ˈeə ◂ AmE -ˈe ə r ◂ -ˈæ ə r —French [ plɛ nɛːʁ \] Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012