Here are some specific ways it's used:
* A large, elaborate entertainment, typically with music, dancing, and special effects. Think of a Broadway musical, a circus show, or a lavish costume party.
* A lavish or extravagant display or event. This could be anything from a fancy wedding reception to a grand opening of a new building.
* Something that is excessive or over-the-top. This use is often more informal and can have a slightly negative connotation. For example, you might say, "That was a real extravaganza of a vacation, but it really put a dent in my bank account!"
In essence, "extravaganza" describes something that goes above and beyond the ordinary, making it a memorable and often awe-inspiring experience.