Also found in: Thesaurus, Encyclopedia, Wikipedia.
1. Nautical Either of two short periods of watch duty, from 4 to 6 pm or 6 to 8 pm.
2. A late night shift.
[Probably from dog-sleep, a light or interrupted sleep.]
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.
1. (Nautical Terms) either of two two-hour watches aboard ship, from four to six p.m. or from six to eight p.m
2. (Mining & Quarrying) NZ a shift from midnight to six a.m. in a mine
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or dog′ watch`,
2. Informal. any night shift, esp. the last or latest one.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.