1. precancel - Noun
2. precancel - Verb
precancel (third-person singular simple present precancels, present participle precanceling or precancelling, simple past and past participle precanceled or precancelled)
(transitive) To cancel or frank (a postage stamp) prior to posting it.
English Wikipedia has an article on:precancelWikipedia
precancel (plural precancels)
A postage stamp or mail item that has been precancelled.