If your hair is sleek, it is smooth and glossy. If your car is sleek, it's shiny and looks like it goes fast. Sleek always means smooth, glossy, and streamlined.

Sleek is a variant of the word, slick. When you slick back your hair with grease, it becomes sleek. Cats are often called sleek with their silky coats and lithe movements. A dress could be described as sleek, if it fits tightly to your body and makes you look polished and perfectly fit. When something is sleek, it's aerodynamic.

Definitions of sleek

adj having a smooth, gleaming surface reflecting light

sleek black fur”
satiny, silken, silklike, silky, slick
emitting or reflecting light readily or in large amounts

adj well-groomed and neatly tailored; especially too well-groomed

sleek figures in expensive clothes”
neat and smart in appearance; well cared for

adj designed or arranged to offer the least resistant to fluid flow

aerodynamic, flowing, streamlined
having a surface free from roughness or bumps or ridges or irregularities

v make slick or smooth

Type of:
polish, shine, smooth, smoothen
make (a surface) shine

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