Postage (noun)

1. The cost of sending mail or parcels through a postal service.
2. A stamp or set of stamps used to pay for the cost of sending mail.

Origin:

The word postage comes from the word post, meaning the system of sending mail or the act of sending mail and age, meaning fee. it has been in use since the 18th century.

Examples:

1. The postage for the package was $5.
2. He bought a book of postage stamps.
3. She licked the postage stamp and stuck it on the envelope.
4. Postage rates have increased again.
5. The postage for international delivery is more expensive.