peep sight

American  

noun

1. a plate containing a small hole through which a gunner peeps in sighting.

---

peep sight British  

noun

1. an adjustable rear gun sight with a narrow aperture through which the target and the front sight are aligned when aiming

---

Etymology

Origin of peep sight

First recorded in 1880–85

Example Sentences

Another improvement in the new British rifle is its aperture peep sight, replacing the v-sight long peculiar to the British Army.

From Time Magazine Archive

The rifle, which has a peep sight and range and windage adjustments, is so accurate that a reasonably good shot can hit a thumbnail-sized target at 30 feet.

From Time Magazine Archive

The Peep Show It�s rare that you find a peep sight with any additional features.

From Time Magazine Archive

The above illustration shows the correct alignment of the peep sight, front sight, and the bull's-eye.

From The Plattsburg Manual A Handbook for Military Training by Ellis, Olin Oglesby

Clap your peep sight on that, Hap Smith.

From Six Feet Four by Gregory, Jackson