society > travel > air or space travel > a means of conveyance through the air > construction and servicing aircraft or spacecraft > [noun] > making streamlined (3)
To ‘clean’ (an aeroplane) aerodynamically, to make streamlined. Also with up. So cleaning-up n. Cf. clean, adj. 13c.
The action or process of smoothing the lines of a ship, aircraft, or motor vehicle, typically in order to reduce drag; streamlining.
The action of giving something a streamlined shape.