/ ˈpɒmpəs; NAmE ˈpɑːm-/ adjective
( disapproving ) showing that you think you are more important than other people, especially by using long and formal words
SYN pretentious :
a pompous official
► pom·pos·ity / pɒmˈpɒsəti; NAmE pɑːmˈpɑːs-/ noun [ U ]:
The prince's manner was informal, without a trace of pomposity.
► pom·pous·ly adverb
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WORD ORIGIN
late Middle English : from Old French pompeux full of grandeur, from late Latin pomposus , from pompa pomp.