Smoothing \Smooth"ing\, a. & n. fr. Smooth, v.

Smoothing iron, an iron instrument with a polished face, for smoothing clothes; a sadiron; a flatiron.

Smoothing plane, a short, finely set plane, for smoothing and finishing work.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Smooth \Smooth\, v. t. [imp. & p. p. Smoothed (sm[=oo]thd); p. pr. & vb. n. Smoothing.]

[OE. smothen, smethen, AS. sm[=e][eth]ian; cf. LG. sm["o]den. See Smooth, a.]

To make smooth; to make even on the surface by any means; as, to smooth a board with a plane; to smooth cloth with an iron. Specifically:
   (a) To free from obstruction; to make easy.

Thou, Abelard! the last sad office pay, And smooth my passage to the realms of day. --Pope.
   (b) To free from harshness; to make flowing.

In their motions harmony divine So smooths her charming tones that God's own ear Listens delighted. --Milton.
   (c) To palliate; to gloze; as, to smooth over a fault.
   (d) To give a smooth or calm appearance to.

Each perturbation smoothed with outward calm. --Milton.
   (e) To ease; to regulate. --Dryden.

Source: Webster's Revised Unabridged Dictionary (1913)