- a postage stamp sold by a government at a premium above its face value, the excess being used for a nonpostal purpose, as a charity.
- noting or pertaining to such a stamp.
Origin of semipostal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- philately, mainly US denoting stamps where all or part of the receipts from sale are given to some charitable cause