The definition of pompous is someone who has excessive self-esteem.(adjective)
An example of pompous is someone who constantly talks about what they've accomplished.
See pompous in Webster's New World College Dictionary
Origin: ME < MFr pompeus < LL pomposus < L pompa: see pomp
See pompous in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French pompeux
Origin: , from Late Latin pompōsus
Origin: , from Latin pompa, pomp; see pomp.
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