正せい楽がくMeanings1nouncourt music; gagakuRefers to the traditional Japanese court music, often used in the context of 雅楽 (gagaku).See also: 雅楽正せい楽がくは雅が楽がくの一いち部ぶとして演えん奏そうされる。Seigaku is performed as part of gagaku.