sleek (sleeker comparative) (sleekest superlative )
1 adj Sleek hair or fur is smooth and shiny and looks healthy.
...sleek black hair..., The horse's sleek body gleamed.
2 adj If you describe someone as sleek, you mean that they look rich and stylish.
Lord White is as sleek and elegant as any other multi millionaire businessman.
3 adj Sleek vehicles, furniture, or other objects look smooth, shiny, and expensive.
... a sleek white BMW., ...sleek modern furniture.