1 n. in a lexicalized phrase — come from away or CFA; Atlantic Canada
a person who is not from Atlantic Canada or any of its provinces.
Type: 1. Origin — The term, which is a lexicalized phrase, is used in Atlantic Canada, i.e. Newfoundland and the three Maritime Provinces (Prince Edward Island, Nova Scotia, New Brunswick) to refer to the respective location, e.g. on Prince Edward Island (PEI), the term means 'not from PEI'. The expression is perhaps most frequently reported for Newfoundland and is hardly, if at all, used outside of Canada (see Chart 1). Within Canada, PEI is the clear leader, followed by Newfoundland and, with some lag, Nova Scotia (Chart 2). Other hits refer to these uses in the Maritimes.
See also: across CFA
2 adv. — usually from away, Atlantic Canada
a place other than Atlantic Canada.
Type: 3. Semantic Change — Away acquires the specialized meaning 'not from Atlantic Canada'.
See also COD-2, s.v. "away" (6), which is marked "Cdn (Nfld & Maritimes)".
Images:

Chart 1: Internet Domain Search, 10 Sep. 2012 
Chart 2: Regional Domain Search, 19 Mar. 2016