Pronunciation: (bān),[key] —n. 1. a person or thing that ruins or spoils: Gambling was the bane of his existence. 2. a deadly poison (often used in combination, as in the names of poisonous plants): wolfsbane; henbane. 3. death; destruction; ruin.
4. Obs.that which causes death or destroys life: entrapped and drowned beneath the watery bane.