Use 'grandiose' to describe things overly decorative or complicated, suggesting impracticality or showiness. The wedding had grandiose decorations that overshadowed the ceremony itself.
Pro Tip 2/3
Scaled-Up Reality
'Grandiose' is often used to exaggerate an actual quality, making something ordinary seem extraordinary. She described her modest home as a grandiose palace to impress her friends.
Pro Tip 3/3
Critical Tone
When calling plans or ideas grandiose, the speaker may be skeptically pointing out they're overly ambitious. His grandiose business scheme seemed unrealistic to potential investors.