Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- v. To cancel (a postage stamp) before mailing.
- n. A precanceled stamp or envelope.
Wiktionary
- v. To cancel or frank a postage stamp prior to posting it
- n. A postage stamp or mail item that has been precancelled
Examples
“US Airways Group Inc., which has a hub in Philadelphia, said it cut 679 flights Sunday and planned to "precancel" 100 flights Monday.”
“Caldwell ID 219 precancel on 1972 National Parks set”
“In many cases, carriers try to precancel flights before a storm so their customers don't come to the airport and end up camping there.”
The Wall Street Journal: Blizzard Strands Travelers Across U.S.
“Some precancel stamp collectors might contend that a certain 2 cent Liberty precancel from Phenix City, Alabama is the rarest U.S. stamp, since it was made solely at the Bureau of Engraving and Printing and there's only one.”
Lists
These user-created lists contain the word ‘precancel’.
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Philately
Definitions mainly taken from this glossary.
aerogramme, aerophilately, black jack, cachet, cancellation, cinderella, albino, album weed, ambulante, aniline ink, authentication mark, back-of-book and 104 more...
Tweets
Looking for tweets for precancel.

reesetee A stamp with a special overprint cancellation that allows it to bypass normal canceling. In some cases, the term also designates a specific mail-handling service, such as "Presorted First-Class." Other precancels may include the city and state of the issuing post office. Precanceled stamps are used by volume mailers who hold a permit to use them. Aug 25, 2008