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English definition of “vacuous”

vacuous

adjective     /ˈvæk.ju.əs/ formal
not expressing or showing intelligent thought or purpose: a vacuous remark/question/expression/smileStupid and sillyOf unsound mind vacuously     /-li/ adverb Stupid and sillyOf unsound mind vacuousness     /-nəs/ noun [U] (also vacuity, /vəˈkjuː.ə.ti/ US  /-ə.t̬i/)
(Definition of vacuous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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