1A native or inhabitant of the province (formerly a sultanate) of Aceh in northern Sumatra.
2The Austronesian language of this people.
Of or relating to the Acehnese or their language.
Late 17th century; earliest use found in John Dunton (1659–1732), bookseller. From Achin, †Acheen, former variants of Aceh (Indonesian Aceh, Malay Aceh), the name of a sultanate (now a province) in northern Sumatra + -ese.