Webster's English Dictionary

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sleek

1. sleek \'sle-k\ vb [ME sleken, alter. of sliken] 1: SLICK  2: to cover up 
   : gloss over  : SLICK 
2. sleek \'sle-k\ aj [alter. of 2slick] 1a: smooth and glossy as if 
   polished {~ dark hair}  1b: having a smooth well-groomed look {~ cattle 
   grazing}  1c: healthy-looking  2: SLICK  3a: having a prosperous air : 
   THRIVING  3b: ELEGANT, STYLISH  - sleek.ly av