'Finder' definitions:

Definition of 'finder'

From: WordNet
noun
Someone who comes upon something after searching
noun
Someone who is the first to observe something [syn: finder, discoverer, spotter]
noun
Optical device that helps a user to find the target of interest [syn: finder, viewfinder, view finder]

Definition of 'Finder'

From: GCIDE
  • Finder \Find"er\, n.
  • 1. One who, or that which, finds; specifically (Astron.), a small telescope of low power and large field of view, attached to a larger telescope, for the purpose of finding an object more readily, called also a finder telescope or finder scope. [1913 Webster +PJC]
  • 2. (Micros.) A slide ruled in squares, so as to assist in locating particular points in the field of vision. [Webster 1913 Suppl.]