Chaperon

Part of speech: noun (n.)

1. A hood; especially, an ornamental or an official hood. His head and face covered with a chaperon, out of which there are but two holes to look through. Howell.

2. A divice placed on the foreheads of horses which draw the hearse in pompous funerals.

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

Part of speech: verb (v.)

To attend in public places as a guide and protector; to matronize. Fortunately Lady Bell Finley, whom I had promised to chaperon, sent to excuse herself. Hannah More.