auk·let (ôk?l?t)n. Any of various small auks of the genus Aethia and related genera of northern Pacific coasts and waters.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.auklet (???kl?t) n (Animals) any of various small auks of the genera Aethia and PtychoramphusCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014auk?let (??k l?t) n. any of several small auks of N Pacific coasts, as Aethia cristatella, having a crest of recurved plumes. [1885?90] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.