1. The act of cancelling; calling off some arrangement
   "The airline offered compensation for the flight cancelation";
   - cancellation
    
2. (philately) a mark made on a postage stamp to show it has been used
   "The rare stamp had a clear Manchester cancelation";
   - cancellation
    
3. (mathematics) the elimination of equal terms or factors from an equation or expression
   "The cancelation of common factors simplified the fraction";
   - cancellation

Derived forms: cancelations

Type of: nullification, override

Encyclopedia: Cancelation