(1):

(n.) A hood; especially, an ornamental or an official hood.

(2):

(n.) A device placed on the foreheads of horses which draw the hearse in pompous funerals.

(3):

(n.) A matron who accompanies a young lady in public, for propriety, or as a guide and protector.

(4):

(v. t.) To attend in public places as a guide and protector; to matronize.