explorer

Short definition from Wiktionary

Noun

1. 1
   One who explores something
2. 2
   A person who by means of travel (notably an expedition) searches out new information.
3. 3
   Any of various hand tools, with sharp points, used in dentistry.
4. 4
   A visual representation of a file system etc. through which the user can navigate.
5. 5
   A participant in the Exploring program, which focuses on career exploration.
6. 6
   A participant in the Fire Service Exploring program.