1. not mapped or surveyed; unknown or unexplored
Usage: often used figuratively

Examples

• The explorers sailed into uncharted waters.
• Scientists are venturing into uncharted territory with this new research.
• The island remained uncharted until the 1800s.
• We’re entering uncharted waters with this business venture.
• The cave system is largely uncharted and dangerous.
• This represents uncharted territory for our company.
• The remote region contains vast uncharted wilderness areas.