What is the meaning of Packet?

A small pack or package; a little bundle or parcel

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. Packet boat, ship, vessel (Wikipedia).

A specimen envelope containing small, dried plants or containing parts of plants when attached to a larger sheet.

A small fragment of data as transmitted on some types of network, notably Ethernet networks (Wikipedia).

A protocol data unit of the Internet Protocol.

A message sent over a transport layer protocol.

A plastic bag.

Synonym of package (male genitalia).

A large amount of money.

To make up into a packet or bundle.

To send in a packet or dispatch vessel.

To ply with a packet or dispatch boat.

To subject to a denial-of-service attack in which a large number of data packets are sent.

imperative plural of packen

packet (small fragment of data)

definite singular of pack

Source: wiktionary.org