1. That which happens without design; chance; hazard; hap; hence, chance of danger or loss. Nay, a far less good to man it will be found, if she must, at all adventures, be fastened upon him individually. (Milton)
3. The encountering of risks; hazardous and striking enterprise; a bold undertaking, in which hazards are to be encountered, and the issue is staked upon unforeseen events; a daring feat. He loved excitement and adventure. (Macaulay)
5. A mercantile or speculative enterprise of hazard; a venture; a shipment by a merchant on his own account. A bill of adventure, a writing setting forth that the goods shipped are at the owner's risk.
Synonym: Undertaking, enterprise, venture, event.