Definition of "ha-ha" []

• A sound made in imitation of laughter. (noun)
• Slang An instance of amusement. Often used in the plural: drove past the old school just for ha-has. (noun)
• Used to express amusement or scorn. (interjection)
• See sunk fence. (noun)

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.

• "Maybe making him go ouch some, instead of ha-ha, would get me out of here."
• "To paraphrase Dr. Coop, it was an a-ha and a ha-ha moment, as one by one, the staffers realized that Jackie's relationship with Eddie the pharmacist wasn't just a fling — it was an affair."
• "The ha-ha moment went to the identical Winklevoss twins, as the crew-rowing Adonises decide whether they should mincemeat the Facebook founder for stealing their idea."