n. The act of seizing; the act of taking or laying hold; a taking possession, either legally or by force: as, the seizure of smuggled goods by revenue officers; seizure of arms by a mob.n. The fact of being seized or in possession of anything; possession; hold.n. The thing seized; the thing taken hold or possession of.n. A sudden onset or attack, as of some malady, emotion, panic, or the like; a spell; a turn.