/ Dictionary / Index E en plein air*: Meaning and Definition of Find definitions for: en plein air Pronunciation: (än ple ner'), [key] — French. French. in the open air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. enplane en prise Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language