ALL meanings of forty-ninth parallel
- noun forty-ninth parallel an informal name for the Canadian border with the USA, which is in part delineated by the parallel line of latitude at 49°N 0
- noun forty-ninth parallel (Canada, US) A nickname for the approximately 1200-mile (1900-kilometer) portion of the border between Canada and the USA, extending along the forty-ninth parallel of latitude from Lake of the Woods to the Pacific Ocean. 0
- noun forty-ninth parallel (Canada, US, nonstandard) A nickname for the entire border between Canada and the USA. 0