Definition of principality noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˌprɪnsɪˈpæləti//
    ; NAmE NAmE//ˌprɪnsɪˈpæləti//
    (pl. principalities)
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  1. 1[countable] a country that is ruled by a prince the principality of Monaco
  2. 2the Principality [singular] (British English) Wales
  3. Word OriginMiddle English (denoting the rank of a prince): from Old French principalite, from late Latin principalitas, from Latin principalis ‘first, original’, from princeps, princip- ‘first, chief’.
See the Oxford Advanced American Dictionary entry: principality