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First attested in 1705. From Acadia +‎ -n (one that is).



Acadian (comparative more Acadian, superlative most Acadian)

  1. Of or pertaining to Acadia, its people, or their language or culture. [First attested in the early 19th century.][1]
  2. (geology) Of or pertaining to the Acadian epoch.

Usage notes[edit]

  • The second US pronunciation is a rarely used historical version that led to the word Cajun.[2]

Derived terms[edit]



Acadian (plural Acadians)

  1. A native of Acadia or their descendants who moved to Louisiana; a Cajun. [First attested in the early 18th century.][1]
  2. (Canada) A descendant of the settlers of the French colony of Acadia in current eastern Canada. More specifically a speaker of Acadian French.

Proper noun[edit]


  1. (rare) Ellipsis of Acadian French: the form of French spoken in Acadia.
    In many places, Acadian has been supplanted by English and by Standard French.
  2. (geology) The Middle Cambrian epoch, lasting from 497 million years ago to 509 million years ago.
    The Burgess Shale contains fossils of very odd organisms that lived during the Acadian.


Derived terms[edit]


  1. 1.0 1.1 Lesley Brown, editor-in-chief; William R. Trumble and Angus Stevenson, editors (2002) , “Acadian”, in The Shorter Oxford English Dictionary on Historical Principles, 5th edition, Oxford; New York, N.Y.: Oxford University Press, →ISBN.
  2. ^ Philip Babcock Gove (editor), Webster's Third International Dictionary of the English Language, Unabridged (G. & C. Merriam Co., 1976 [1909], →ISBN)