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Thunder Bay

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noun
a port in W Ontario, in S Canada, on Lake Superior: created in 1970 by the merger of twin cities (Fort William and Port Arthur ) and two adjoining townships.
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Also called Lakehead.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for Thunder Bay

Thunder Bay

noun
a port in central Canada, in Ontario on Lake Superior: formed in 1970 by the amalgamation of Fort William and Port Arthur; the head of the St Lawrence Seaway for Canada. Pop: 103 215 (2001)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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