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English definition of “swollen head”

swollen head

noun [C usually singular]     (US usually also swelled head)
If someone has a swollen head, they think they are more intelligent and more important than they really are: Don't compliment him any more, or he'll get a swollen head. → Compare bigheadShowing arrogance and conceitConfidence and self-assuranceBoastingUnpleasant people in generalUnpleasant men swollen-headed     /ˌswəʊ.lənˈhed.ɪd/ US  /ˌswoʊ-/ adjective informal disapproving
(Definition of swollen head noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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