Webster 1913 Edition
imp. & p. p.
p. pr. & vb. n.
To render calm or quiet; to calm; to still; to appease.
Soft whispering airs . . .
To keep from motion, or stop the progress of, by the stilling of the wind;
as, the fleet was.
Webster 1828 Edition
1.To still; to make quiet; to appease; to stop, or repress motion in a body; used of the elements and of the passions; as, to becalm the ocean, or the mind. But calm is generally used.
2.To intercept the current of wind, so as to prevent motion; to keep from motion for want of wind; as, highlands becalm a ship.