(1):

(n.) A prerogative of royalty.

(2):

(v. t.) To enerta/n in a regal or sumptuous manner; to enrtertain with something that delights; to gratify; to refresh; as, to regale the taste, the eye, or the ear.

(3):

(v. t.) A sumptuous repast; a banquet.

(4):

(v. i.) To feast; t/ fare sumtuously.