1. pinhole - Noun
2. pinhole - Verb
a small puncture that might have been made by a pin
Source: WordNetEnough. Sudden enough. Sudden all far. No move and sudden all far. All least. Three pins. One pinhole. In dimmost dim. Vasts apart. At bounds of boundless void. Whence no farther. Best worse no farther. Nohow less. Nohow worse. Nohow naught. Nohow on. Samuel Beckett
A hole in the cave wall will act as a pinhole camera and project a laterally reversed, upside down image on a piece of paper. Source: Internet
A few period pinhole cancellations, as is typical for this kind of item, old creases, but very good condition, nice and clean with no flaws. Source: Internet
As the pinhole is made smaller, the image gets sharper, but the projected image becomes dimmer. Source: Internet
A safe alternative to eclipse glasses is a pinhole projector, NASA says. Source: Internet
Detection of pinhole leaks would come from a visual or olfactory inspection, aerial surveying, or mass-balance inconsistencies. Source: Internet