British EnglishBrE a hole in a door, wall etc, through which you can look at someone secretly 〔门、墙等上的〕观察孔
Examples from the Corpus
spyhole• Amin crossed to the other side of the chamber and looked through a spyhole in the wall.• There was a spyhole in one of the flats.• She acknowledged the spyhole and peered through it, sometimes, when the sleeplessness got very bad.• He raised his head a moment and looked directly at the spyhole as if he sensed some one watching.• The guardslid the cover off the spyhole on the door.• Yet if she moved the chair, she saw the spyhole.• Contrary to her usualhabit she did not glance through the spyhole before beginning to undo the chain.• Then a little light came through the uncoveredspyhole, a flickering, surreptitious light.