What does spyhole mean?
A spyhole is a small opening through which someone can look without being seen. It is especially associated with a small viewing aperture in a door, but the term can also describe a similar opening in a wall or other barrier. The word combines the ideas of spying and a hole, making its function immediately understandable: it provides a protected vantage point from which to observe people or events. In everyday use, “spyhole” often suggests secrecy or surveillance and may evoke doors, fortifications, old buildings, and guarded spaces. It can also be used more figuratively for a narrow view of the world or for a limited channel of observation. In British English, the word is fairly established and familiar; in American English, it is less common but still readily understood. “Peephole” is often a close alternative, although that term more specifically refers to an aperture in a door.
nounA small hole or opening through which a person can look without being seen, especially one in a door, wall, or other barrier.
- A small opening through which someone can observe an area or person unseen, especially in a door, wall, or other barrier.
"She watched the corridor through a spyhole in the heavy wooden door."
"The guard checked the courtyard through a spyhole before opening the gate."
"Novelists often use a spyhole to suggest secrecy, surveillance, or a divided world between observer and observed."
The standard plural is “spyholes.”
"The guards watched the entrances through several small spyholes."
A spyhole is a tiny window for watching without being watched: a small piece of architecture with a remarkably large implication.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of spyhole
Spyhole is an English compound formed from “spy” and “hole.” The word “spy” comes through Old French from a Germanic root associated with looking or watching closely, while “hole” descends from Old English hāl. The compound combines these older elements with the straightforward modern sense of an opening used for observation; related words include “espy,” “espionage,” and “spyglass.”
Related word forms
How spyhole is actually used
The word is neutral in tone but carries a strong implication of concealed observation. It is especially associated with British English, though it is understood and used in American English as well.
Easily confused with spyhole
A peephole is specifically a small viewing aperture in a door, whereas a spyhole can refer more generally to any small hole or opening used for concealed observation.