Adjective grandiloquent has 2 senses
  1. grandiloquent, magniloquent, tall - lofty in style; "he engages in so much tall talk, one never really realizes what he is saying"
    Antonym: unrhetorical (indirect, via rhetorical)
  2. grandiloquent, overblown, pompous, pontifical, portentous - puffed up with vanity; "a grandiloquent and boastful manner"; "overblown oratory"; "a pompous speech"; "pseudo-scientific gobbledygook and pontifical hooey"- Newsweek
    Antonym: unpretentious (indirect, via pretentious)
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