a large, deep-blue or brown harmless snake, Drymarchon corais, ranging from the southern U.S. to South America and invading burrows to prey on small mammals: the eastern subspecies D. corais couperi is now greatly reduced in number.
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Origin of indigo snake
An Americanism dating back to 1880–85
Also called gopher snake.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for indigo snake
a dark-blue nonvenomous North American colubrid snake, Drymarchon corais couperi
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