[pree-kan-suh
l] 
verb, -celed, -cel⋅ing or (especially British) -celled, -cel⋅ling, noun Philately.| 1. | to cancel (a stamp) before placing it on a piece of postal matter. |
| 2. | a precanceled stamp. |
| pre·can·cel (prē-kān'səl) tr.v. pre·can·celed or pre·can·celled, pre·can·cel·ing or pre·can·cel·ling, pre·can·cels To cancel (a postage stamp) before mailing. n. A precanceled stamp or envelope. pre'can·cel·la'tion n. |