Definition of underhung

1 of a lower jaw : projecting beyond the upper jaw : undershot
2 : having an underhung jaw this poor creature, heavy-bodied, bowlegged and underhung— J. A. Thomson
3 : suspended so that the point of support is beneath the load specifically : resting on a track at the bottom instead of being suspended from above underhung sliding door

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History and Etymology for underhung

under entry 1 + hung, past participle of hang

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not constant or steady

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