a large, flightless auk, Pinguinus impennis, of rocky islands off North Atlantic coasts: extinct since 1844.
Origin of great auk
First recorded in 1820–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for great auk
a large flightless auk, Pinguinus impennis, extinct since the middle of the 19th century
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