(1):
(n.) A small pack or package; a little bundle or parcel; as, a packet of letters.
(2):
(n.) Originally, a vessel employed by government to convey dispatches or mails; hence, a vessel employed in conveying dispatches, mails, passengers, and goods, and having fixed days of sailing; a mail boat.
(3):
(v. t.) To make up into a packet or bundle.
(4):
(v. t.) To send in a packet or dispatch vessel.
(5):
(v. i.) To ply with a packet or dispatch boat.