sleeper

[ slee-per ]
/ ˈsli pər /

noun

Origin of sleeper

Middle English word dating back to 1175–1225; see origin at sleep, -er1
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British Dictionary definitions for sleeper

sleeper
/ (ˈsliːpə) /

noun

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