sleek

Short definition from Wiktionary

Adjective

1. 1
   Having an even, smooth surface; smooth
2. 2
   Glossy.
3. 3
   Not rough or harsh.
4. 4
   Slim and streamlined; not plump, thick, or stocky.
5. 5
   Healthy, well-fed and well-groomed; in good condition.
6. 6
   Dated form of slick (“convincing but untrustworthy”).

Adverb

1. 1
   With ease and dexterity.

Verb

1. 1
   To make smooth or glossy; to polish.
2. 2
   To calm or soothe.
3. 3
   To glide.

Noun

1. 1
   That which makes smooth; varnish.