plural of rough sleeper

plural of railway sleeper

plural of spinycheek sleeper

plural of short-sleeper

plural of short sleeper

plural of cold sleeper

plural of hot sleeper

plural of fat sleeper

In Germany, June 27 is Siebenschläfertag (Seven Sleepers Day). The weather on that day is supposed to determine the average weather of the next seven weeks.

A group of people (sleepers) who inconspicuously remain dormant in a community until activated, by a prearranged signal, to perform acts of espionage, sabotage, and/or terrorism.