1. impressive in size, appearance, or general effect; magnificent
2. attempting to impress by affecting greater importance or merit than is actually possessed; pretentious
Usage: often disapproving

Examples

• The palace featured grandiose marble columns and gold-plated ceilings.
• His grandiose plans to build a theme park never materialized.
• The cathedral’s grandiose architecture attracted visitors from around the world.
• She dismissed his grandiose claims about revolutionizing the industry.
• The grandiose ballroom could accommodate five hundred guests.
• His grandiose speech was full of empty promises and big words.
• The grandiose fountain dominated the center of the plaza.