sleek

The definition of sleek is someone or something that is smooth, glossy, shiny, well-groomed or sophisticated.

(adjective)

Shiny and well-groomed hair is an example of hair that would be described as sleek.
A shiny new sports car with clean lines is an example of a car that would be described as sleek.

See sleek in Webster's New World College Dictionary

adjective

smooth and shiny; glossy, as a highly polished surface, well-kept hair or fur, etc.
of well-fed or well-groomed appearance: fat, sleek pigeons
polished in speech and behavior, esp. in a specious way; unctuous
highly fashionable, or stylish; elegant

Origin: var. of slick, with Early ModE vowel lengthening

transitive verb

to make sleek; smooth

Related Forms:

See sleek in American Heritage Dictionary 4

adjective sleek·er, sleek·est

Smooth and lustrous as if polished; glossy: brushed her hair until it was sleek.
Well-groomed and neatly tailored.
Healthy or well-fed; thriving.
Polished or smooth in manner, especially in an unctuous way; slick.

transitive verb sleeked, sleek·ing, sleeks