An opening in a wall, to look through, or to allow the passage of a missile; a loophole.

a loophole for throwing darts (cf. 1a).

Fortification. A narrow vertical opening, usually widening inwards, cut in a wall or other defence, to allow of the passage of missiles.

A loophole in the wall of a castle or city, through which missiles might be discharged. Obsolete.

A hole or opening for looking through; a small window or window-like opening. Formerly also: an opening in a wall through which missiles may be…

(esp. in a medieval fortified building) a narrow vertical slit in a wall for shooting or looking through or to admit light and air; also attributive…

A narrow vertical slit or window in a fortification, wall, etc., through which a missile can be fired; = loophole, n.1 1a.

Fortification. = meurtrière, n. Obsolete. rare.

archaic. A small hole in a fortified wall through which to shoot. (Often in Scott.)

A narrow vertical opening in the wall of a castle or other fortified building for shooting or looking through or to admit light and air; = arrow slit…

(esp. in a medieval fortified building) a narrow vertical slit in a wall for shooting or looking through or to admit light and air; = arrow slit n.

A (small) eyehole; (also occasionally) an arrow slit; = eyelet hole, n. 2. Now rare.

a slit in a wall through which a musket may be fired.

= cross-loop n.

a hole through which to shoot.