plural of cancelment

(dated) cancellation

A hawk's turning motion in midair, often to make a second stoop toward missed prey.

plural of canceleer

present participle of cancel out

(philately) A cancellation mark that is so heavy that it defaces the postage stamp to which it is applied, devaluing it from a collector's point of view.

(philately) Synonym of mute cancel

plural of killer cancel

(transitive) To neutralize the effect of. / (intransitive) Of two or more things: to neutralize each other's effect.

(philately) A postal cancellation that does not state any location or date, used in wartime to prevent the enemy gathering information about troop movements from captured mail.