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Middle English, from Old French seisir ‎(to put in possession of", "to take possession of), from Late Latin sacīre, from Frankish *sakjan ‎(to sue, bring a legal charge against), from Proto-Germanic *sakōną ‎(to charge, seek legal action against), from Proto-Indo-European *sāg(')- ‎(to track). Cognate with Old High German sahhan ‎(to argue, scold), Old English sacian ‎(to strive, contend). More at sake.


seise ‎(third-person singular simple present seises, present participle seising, simple past and past participle seised)

  1. (transitive, law) To vest ownership of a freehold estate in (someone).
    • 1997, Nigel Saul, The Oxford illustrated history of medieval England‎, page 74:
      There a baron was created and seised by the king in a single act. His tenure was a function of his personal relationship with his lord king.
  2. (transitive, with of, law) To put in possession.
    • 1878, Joshua Williams, The Seisin of the Freehold‎, page 55:
      He then died intestate; and I observed that his heir-at-law was not actually seised of Whiteacre, the possession of which became vacant on his ancestor's death
    • 2011, Article 3 section 7, Regulation (EU) No 182/2011 of the European Parliament and of the Council of 16 February 2011, Official Journal of the European Union L 55/15
      Where the appeal committee is seised, it shall meet at the earliest 14 days, except in duly justified cases, and at the latest 6 weeks, after the date of referral.
  3. (dated) To seize.
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Particularly: “When did this go out of date as a spelling of seize?”


  • ((with of) to put in possession): possess

Usage notes[edit]

  • Usually used in passive.




From Old Irish seise, from Old Norse sessi.


seise m ‎(genitive singular seise, nominative plural seisí)

  1. companion, comrade



Irish mutation
Radical Lenition Eclipsis
seise sheise
after "an", tseise
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.

Old Irish[edit]


Borrowing from Old Norse sessi.


seise m

  1. companion