Definitions
1.nounA person who secretly watches and examines the actions of other individuals or organizations and gathers information on them (usually to gain an advantage).
2.verbTo act as a spy."During the Cold War, Russia and America would each spy on each other for recon."
3.verbTo spot; to catch sight of."I think I can spy that hot guy coming over here."
4.verbTo search narrowly; to scrutinize.
5.verbTo explore; to see; to view; inspect and examine secretly, as a country.