(historical) A kind of mechanical signal used on early American railroads, consisting of wooden balls, painted various colors, that were hoisted up and down a pole using a rope and pulley.

To make a decision that dooms one to certain death.

A device used e.g. on a rifle in aiming a projectile, through which the person aiming looks at the intended target.

A personally modified form of American Sign Language intended for communication with gorillas, especially some of those that are subjects of research at the Gorilla Foundation.

plural of Sigala

A surname.

plus sign

plural of sight radius

plural of sight radius

Alternative spelling of signoff