spy

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Spy denotes:

  • a person who espionage operates
  • a built-in doors peephole (possibly with a lens), see peephole
  • a small window in the outer wall of a building, see spy (construction technology)
  • in the broadest sense also other optical devices (e.g. mirrors ) that allow unnoticed observation
  • a tool to measure the width of a gap, see feeler gauge


See also:

Wiktionary: Spy  - explanations of meanings, word origins, synonyms, translations