plein jeu
/ˌpleɪn ˈʒəː/ /ˌplã ˈʒəː/Music
adverb
Chiefly as a direction in a score: with full power (specifically in organ playing).
noun
An organ stop or combination of stops producing a full chorus of montres (diapasons and principals) in octaves, plus fourniture (additional mixture pipes, adding fifths), and sometimes cymbal.
Origin
Mid 19th century. From French plein jeu organ stop that has a very loud sound, a type of mixture stop combining the fourniture and the cymbal from plein + jeu.