en plein

adjective, adverb (postpositive)

(of a gambling bet) placed entirely on a single number, etc

Word Origin for en plein

from French: in full

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012