›(especially of hair, clothes, or shapes) smooth, shiny, and lying close to the body, and therefore looking well cared for; not untidy and with no parts sticking out: The cat had sleek fur.Who owns that sleek black car parked outside your house?disapprovingHe's one of those sleek (= seeming rich and dishonest) businessman types.Straight, even and levelsleekly
/ˈsliː.kli/adverbStraight, even and levelsleekness