Entry 2 senses · 2 variants Webster, 1913 Losel /lōʹzəl/ · Los·el · IPA /ˈloʊzəl/ n. a. 01 n. One who loses by sloth or neglect; a worthless person; a lorel. 1. One who loses by sloth or neglect; a worthless person; a lorel.[Archaic] “One sad losel soils a name for aye.” — Byron. 02 a. Wasteful; slothful. 1. Wasteful; slothful.