1. The amount of money that is paid for the delivery of written correspondence: Sally put the right postage on the airmail letters before putting them into the mailbox.

The clerk told Grace how much postage (stamps or labels) she would need in order to mail her packages.

2. Etymology: from Middle French poste, "place where one is stationed" also, "station for post horses" referring to riders and horses posted at intervals along a route to speed mail delivery in relays, from Italian posto, "post, station"; from Vulgar Latin postum, from Latin positum, past participle of ponere, "to place, to put".