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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.]
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
or dog′ watch`,
2. Informal. any night shift, esp. the last or latest one.