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



BrE BrE//əˈkrɒpəlɪs//
; NAmE NAmE//əˈkrɑːpəlɪs//
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(in an ancient Greek city) a castle, or an area that is designed to resist attack, especially one on top of a hill Word OriginGreek, from akron ‘summit’ + polis ‘city’.
See the Oxford Advanced American Dictionary entry: acropolis