Wiktionary
acquis communautaire
n. The full body of EU law; abbreviated as acquis.
Wikipedia
Acquis communautaire
The Community acquis or acquis communautaire (; ), sometimes called the EU acquis and often shortened to acquis, is the accumulated legislation, legal acts, and court decisions which constitute the body of European Union law. The term is French: acquis meaning "that which has been acquired or obtained", and communautaire meaning "of the community".