What is the definition of grandiliquent?

"Grandiliquent" is not a recognized word in the English language. It is likely a misspelling or a made-up word.

If you were aiming for a similar sounding word, "grandiloquent" is a real word. It means:

Grandiloquent: characterized by a high-flown, pompous, or bombastic style of speech or writing.

Let me know if you had a different word in mind, and I'll be happy to help!