Lewis & Short

ha! interj.

  1. I. Ha hae or hahae, an exclamation of joy, thank heavens! hahae, nunc demum mi animus in tuto locost, Plaut. Ps. 4, 5, 1.
  2. II. Ha ha he, or in one word, hahahe, an exclamation of laughter or derision, ha! ha! ha! Chr. Ha, ha, he! Me. Quid risisti? Ter. Heaut. 5, 1, 13; Plaut. Ps. 4, 1, 36; Ter. And. 4, 4, 15; id. Eun. 3, 1, 36; 3, 2, 44; id. Hec. 5, 4, 22; id. Phorm. 2, 3, 64: hahahe, jam teneo, quid sit, Plaut. Poen. 3, 5, 23.