spyhole

British  

/ ˈspaɪˌhəʊl /

noun

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

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Example Sentences

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

He locked both doors leading into the waiting office, and took up his position at the spyhole that gave him command of his own office.

From Project Gutenberg