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Late Latin; equivalent to interrogate + -ory (pertaining to), or more distantly inter- + rogatory.


  • (US) IPA(key): /ˌɪntəˈɹɑɡəˌtɔɹi/
  • (UK) IPA(key): /ˌɪntəˈɹɒɡətəɹi/, /ˌɪntəˈɹɒɡətɹi/
  • (file)


interrogatory (plural interrogatories)

  1. (law) A formal question submitted to opposing party to answer, generally governed by court rule.
    • 1763-1783, Catharine Macaulay, The History of England from the Accession of James I to that of the Brunswick Line:
      Sidney interposed with an interrogatory concerning the legality of the evidence
    • 2013, James J. Gross, It's Splitsville: Surviving Your Divorce (page 240)
      If those attempts are unsuccessful, the attorney requesting the interrogatories may file a motion for sanctions with the court. The sanctions range from attorney fees to prohibiting the nonanswering party from presenting or defending claims.
  2. A question; an interrogation.
    • 1798, Eleanor Sleath, The Orphan of the Rhine
      But when he found that some of his interrogatories were evaded, and others answered undecisively, the look of gentleness which he had assumed, vanished, and his brow wore the cloud of disappointment and of anger.



interrogatory (comparative more interrogatory, superlative most interrogatory)

  1. Serving to interrogate; questioning.
    An interrogatory glance.