a group of about 1500 islands in S Canada and the N United States, in the St. Lawrence River at the outlet of Lake Ontario: summer resorts.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of or relating to the Thousand Islands or their inhabitants
a group of about 1500 islands between the US and Canada, in the upper St Lawrence River: administratively divided between the two countries
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