Characterized by or causing great merriment.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hilarious" in a sentence
"And hilarious -- absolutely hilarious* -- that Dems have no media allies or waterboys, want no biases, etc."
"Consider This: Although Hilario looks like the word hilarious, many people may not know the traditional Spanish pronunciation is “ee-LAR-ee-oh” with a silent h."
"Now that is what I call hilarious with a pause of "OMG"!"