1) Clean 2) Efficient 3) Sleek 1) Compact 2) Efficient 3) Made more efficient 4) Modernized 5) Stripped of nonessentials 
The shape of the exposed contours of an aeroplane for the least possible air drag; usually rounded in front, pointed at the rear
Having a smooth even shape that offers the least resistance to movement through the air
Streamlined objects are designed to reduce fluid drag forces. All rough or angular edges are removed, leaving only smooth curved surfaces. Fish, dolphins, falcons, air interceptors and racing cars are good examples of streamlined objects
[adj] - made efficient by stripping off nonessentials
shaped to increase speed of movement and to reduce air or water resistance
aerodynamic adjective designed or arranged to offer the least resistant to fluid flow; ` a streamlined convertible`
A simplified design to reduce resistance while moving through water or air.
having a contour designed to offer the least possible resistance to a current of air, water, etc.; optimally shaped for motion or conductivity. · designed or organized to give maximum efficiency; compact. · modernized; up-to-date.