to share or disseminate another's information or material with one's own audience

An emergency signal sent by radio (or other means) from a ship or aircraft in distress or danger. / An indication of distress.

(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.

(rail transport) A signal set at danger and showing a red light or other stop indication, which a train driver must not pass until it changes or until manually cleared past the signal by a dispatcher.

a signal, which can vary in strength due to various factors, transmitted and received by radio by means of radio waves.

plural of signal strength

the (measured) strength of a radio signal as received by a radio or any other device receiving radio signals, such as a mobile phone.

(biochemistry) A series of chemical reactions within a cell which start when a transmembrane protein comes into contact with a chemical signal, resulting in a second messenger being triggered.

A handgun designed to discharge an illumination flare.

(rail transport) a structure erected over one or more railway tracks, carrying one or more signals. Smaller structures usually have a single support, and larger structures are supported on both sides.