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spyhole

British  
/ ˈspaɪˌhəʊl /

noun

  1. a small hole in a door, etc through which one may watch secretly; peephole

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Before she could use the spyhole in the door to find out who was there, the woman said the door began to shake.

From BBC

Through the spyhole in the hotel room door, she could see masked workers sterilising hallway carpets daily.

From Reuters

Soon the light was sufficient for me to see out of my spyhole.

From Project Gutenberg

The door is an ordinary prison cell door, possessing spyholes and flaptrap, and large iron bars and locks.

From Project Gutenberg

Through the spyhole, I spot another man lurking, who also begins to shout, backing up whatever Bill says: "He's coming in, it's his right."

From The Guardian