A pinhole is a tiny hole, such as that made by a pin.
Pinhole may also refer to: Pinhole (optics), a small hole used as an optical aperture Pinhole (band), a rock band from Liverpool, England, later to become The Dead 60s Pinhole (song), a song by Japanese rock band Ogre You Asshole Firewall pinhole, in computer networking, a port that is opened through a firewall for a particular application