The Collaborative International Dictionary of English v.0.48:

Seizure \Sei"zure\, n.
   1. The act of seizing, or the state of being seized; sudden
      and violent grasp or gripe; a taking into possession; as,
      the seizure of a thief, a property, a throne, etc.
      [1913 Webster]

   2. Retention within one's grasp or power; hold; possession;
      ownership.
      [1913 Webster]

            Make o'er thy honor by a deed of trust,
            And give me seizure of the mighty wealth. --Dryden.
      [1913 Webster]

   3. That which is seized, or taken possession of; a thing laid
      hold of, or possessed.
      [1913 Webster] Sejant

WordNet (r) 3.0 (2006):

seizure
    n 1: a sudden occurrence (or recurrence) of a disease; "he
         suffered an epileptic seizure" [syn: seizure, ictus,
         raptus]
    2: the act of forcibly dispossessing an owner of property [syn:
       capture, gaining control, seizure]
    3: the act of taking of a person by force [syn: capture,
       seizure]
    4: the taking possession of something by legal process