Ensemble meaning : A group of separate things that contribute to a coordinated whole. A coordinated costume or outfit; a suit. (collective) A group of musicians, dancers, actors, etc who perform together; e.g. the chorus of a ballet company. A piece for several instrumentalists or vocalists. A probability distribution for the state of the system. (machine learning) A supervised learning algorithm combining multiple hypotheses. To put together in a coordinated whole. To perform in a musical ensemble.