ha-ha 1
/hah"hah", hah'hah"/ , interj., n.
(used as an exclamation or representation of laughter, as in expressing amusement or derision.) Cf. haw-haw .
[ bef. 1000; ME, OE; of imit. orig. ]
ha-ha 2
/hah"hah'/ , n.
See sunk fence .
[ 1705-15; haha repetitive compound based on ha! exclamation of surprise ]