Entry 2 senses · 2 variants Webster, 1913 hee-haw · IPA /ˈhiː.hɔ̰̃ː/ v. i. n. 01 v. i. to bray in the manner of a donkey. 1. to bray in the manner of a donkey. Syn. bray. 02 n. a loud laugh that sounds like a horse neighing. 1. a loud laugh that sounds like a horse neighing. Syn. horselaugh, ha-ha, haw-haw.