ha-ha Definition

ha-ha¹
haw-haw
exclamation

1. A conventional way of representing the sound of laughter.
2. Expressing triumph, mockery, scorn, etc.

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ha-ha²
haw-haw
noun

1. A wall or a fence separating areas of land in a large garden or park, but placed in a ditch so as not to interrupt the view.

Etymology: 18c: French, possibly from the supposed cry made when discovering one.