1. An unfortunate event, especially something unlucky or amusing, that can happen to anyone; a mishap: Jane's misadventures began when she lost her key, and soon after missed the bus, forgot her purse on the bus, and was late for work.
2. In law, a death due to an unintentional accident without any violation of law or criminal negligence: A misadventure is an accidental decease that is not caused by a breach of the law or any illicit dereliction.