from The American Heritage® Dictionary of the English Language, 4th Edition

  • adv. By virtue of office or position.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. By virtue of the office that originated it, or of the title held

from the GNU version of the Collaborative International Dictionary of English

  • From office; by virtue, or as a consequence, of an office; officially.

from The Century Dictionary and Cyclopedia

  • n. By virtue of office (and without other especial authority): as, a justice of the peace may ex officio take sureties of the peace: also used adjectively: as, an ex officio member of a body.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. by virtue of an office or position
  • adv. by virtue of position


Latin ex officiō : ex, from + officiō, ablative of officium, office.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin (Wiktionary)


  • "But now I'm president of the temple, and that makes me chairman ex officio of the Building Committee and I will not be denied."

    Saturday the Rabbi Went Hungry

  • As Bailiff of Stratford, he was ex officio a justice of the peace; and two warrants are extant, granted by him in December, 1568, for the arrest of John Ball and Richard Walcar on account of debts; both of them bearing witness that “he had a mark to himself, like an honest, plain-dealing man.”

    Shakespeare His Life Art And Characters

  • The Normal College, in Randolph County, has been placed partly under the direction of the State, and as Superintendent of Common Schools I am ex officio Secretary of the Board of Trustees.

    First Annual Report of the General Superintendent of Common Schools

  • Interesting… his father was listed as an ex officio member of the board, and Lew Parmina was now listed as CEO.

    Command Decision


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  • There shall be one or more faculty/staff advisors who shall be members ex officio with no voting privileges

    October 2, 2010