down east adjective 1adverb 1noun 1 adjective1 •Of the Maritimes, Maine or adjoining parts. adverb1 •In or into the Maritimes, Maine or adjoining parts. noun1 •Northeastern New England (particularly the easternmost section of the U.S. state of Maine) and Canada's Maritime provinces (sometimes including the Gaspé Peninsula and Newfoundland), an area that corresponds to the historical French territory of Acadia.