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Webster 1913 Edition

Verb.

[Of imitative origin.]

To laugh boisterously.

[Colloq. U. S.]

haw-haw’d

, I tell you, for more than half an hour.

Major Jack Downing.

Noun.

[duplication of haw, a hedge.] A fence or bank that interrupts an alley or walk, sunk between slopes and not perceived till approached.