n. — Transportation
an airline operating in remote areas, usually in Northern Canada.
Type: 5. Frequency — Bush line is an abbreviation of bush airline. The term bush is associated with remoteness and uninhabited areas that have not been cleared of trees, which are particularly common in the Canadian North. Bush airline appears most frequently in Canada (see Chart 1).
See also Gage-1, s.v. "bush line", which is marked "Cdn.", ITP Nelson, s.v. "bush line", which is marked "Canadian".
See also: bush party
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Chart 1: Internet Domain Search, 16 Sep. 2013