explorer

noun4

1. •
   One who explores something
2. •
   A person who by means of travel (notably an expedition) searches out new information.

   • The dream of a Northwest Passage lured European explorers for centuries with the promise of a quick, if hazardous, Arctic sea route across the New World to the wealth of Asia. — 1989
3. •
   A visual representation of a file system etc. through which the user can navigate.

   • For example, Vista includes a document explorer that shows just the documents in a location without considering all of the other files that might appear there. — 2007
4. •
   Any of various hand tools, with sharp points, used in dentistry.

noun2

1. •
   (US) A participant in the Exploring program, which focuses on career exploration.
2. •
   (US) A participant in the Fire Service Exploring program.