I. noun
( -s )
Etymology: from gerund of sheathe
1. : the action of one that sheathes something
2. : material used to sheathe something
no. 1 tongue-and-groove sheathing
: a protective or ornamental cover
sheathing of copper
waterproof sheathing
especially : the first covering of boards or of waterproof material on the outside wall of a frame house or on a timber roof
II. adjective
Etymology: from present participle of sheathe
: enclosing or investing as or with a sheath