1. One who seeks risky ventures, or who engages in hazardous enterprises: Tom's brother was an adventurer who was always looking for success through daring exploits.
2. One who engages in warlike undertakings, one who makes war at his own risk. an individual who attaches himself to no party; a soldier of fortune: An adventurer can also be a person who tries to gain wealth unscrupulously.
3. One who is on the look-out for chances of personal advancement; one who lives by his wits: Doug loved being an adventurer by relying on his own mental ability and intelligence in order to be successful in keeping up his high standard of living.