* Formal: The comedian's act was hilarious, leaving the audience in stitches.
* Informal: My friend's jokes were so hilarious I almost choked on my coffee!
* Descriptive: The movie's ending was hilarious with its unexpected twist and over-the-top characters.
* Comparative: That prank was even more hilarious than the last one!
You can also use "hilarious" as a stand-alone exclamation:
* "That's hilarious!"
* "Oh, that's hilarious!"
No matter how you choose to use it, "hilarious" is a great word to describe something funny and entertaining!