grandiose
/ɡɹæn.diˈəʊs/adjective
Very large or ambitious in a way meant to impress.
Example sentence
- “He announced grandiose plans to build the tallest tower in the city.”
Almost always disapproving where 'grand' can be sincere praise: grandiose plans are announced, not achieved. In psychiatry, grandiosity names inflated self-importance.