plural of signal aspect

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.

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.

(computing) A signal that oscillates between a high and a low state and is used like a metronome to coordinate actions of digital circuits.

simple past tense and past participle of virtue signal

(intransitive) To practice virtue signalling.

(US, Australia) Any of the large metal boxes containing traffic signal controls, found at roadsides and intersections, and often made available by the local council for artistic work.