Definify.com
Webster 1913 Edition
Masting
Mast′ing
,Noun.
(Naut.)
The act or process of putting a mast or masts into a vessel; also, the scientific principles which determine the position of masts, and the mechanical methods of placing them.
Masting house
(Naut.)
, a large building, with suitable mechanism overhanging the water, used for stepping and unstepping the masts of vessels.