The quality of being grand, impressive, or imposing; sometimes implies exaggerated or excessive grandness.
From grandiose plus -ity (from Latin -itas), a suffix that creates abstract nouns expressing quality or state. This suffix comes from Latin but has been productive in English since the medieval period.
In psychology, 'grandiosity' describes a pattern of exaggerated self-importance, so the term has both neutral and clinical uses. It's a reminder that the same word can describe magnificent architecture or a problematic personality trait—context is everything in language.
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