a small gummed label issued by postal authorities that can be affixed to an envelope, postcard, or package as evidence that postal charges have been paid. Also called stamp.
post•age-stampPronunciation: (pō'stij-stamp"), [key]
of very small area or size: a postage-stamp bikini.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.