Definition of grandiloquent adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ɡrænˈdɪləkwənt//
; NAmE NAmE//ɡrænˈdɪləkwənt//
(formal, disapproving)
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using long or complicated words in order to impress people synonym pompous Word Originlate 16th cent.: from Latin grandiloquus, literally ‘grand-speaking’, from grandis ‘grand’ + loqui ‘speak’. The ending was altered in English by association with eloquent.
See the Oxford Advanced American Dictionary entry: grandiloquent