"Smooth Operator" is a 1984 song by Sade. Smooth operator or smoothing operator may also refer to: "Smooth Operator" (Big Daddy Kane song), a song by Big Daddy Kane from It's a Big Daddy Thing "Smooth Operator", a song by Dorothy Dandridge Smooth Operator (album), an album recorded by Dorothy Dandridge in 1958, unreleased until 1999 A smoothing operator, used to remove noise from data A mathematical operator, that is a smooth function (i.e., infinitely differentiable)