Oxford Dictionary English

    plenary

    adjective
    adjective
    BrE BrE//ˈpliːnəri//
    ; NAmE NAmE//ˈpliːnəri//
    [only before noun] (formal)
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  1. 1(of meetings, etc.) to be attended by everyone who has the right to attend The new committee holds its first plenary session this week. Wordfinderconferenceconference, delegate, exhibition, name tag, plenary, register, speaker, talk, venue, workshop
  2. 2without any limit; complete The Council has plenary powers to administer the agreement.
    3.  Word Originlate Middle English: from late Latin plenarius ‘complete’, from plenus ‘full’.
See plenary in the Oxford Advanced American Dictionary
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