A lamp used to transmit information or commands through colors or flashing patterns, used in traffic, maritime, and electrical systems

A signal sent using variations in electric current or electromagnetic waves, used for transmitting and storing information

A type of ammunition fired into the air that emits colored light or smoke; used for communication and signaling, especially in military contexts

flare pistol; signal gun used to fire signal flares for communication, giving orders, or marking targets

light-based signal used in communication

A device used to send or display signals, such as a railway semaphore or signaling apparatus; typically found along tracks or roads to manage traffic safety

A flag used for sending signals, transmitting information, or directing actions; semaphore flag.

front indicator light on a vehicle

to send a signal or message; to give a sign

the rear indicator light or tail light of a vehicle

to send a signal or communicate using signals; to give a sign to someone

A signal represented by a series of discrete values, often using binary code

an analog signal

the electronic signal used for transmitting voice or data over a telephone network

a signal used to indicate an urgent situation or a need for immediate assistance

an electronic or digital signal representing human speech

a collective term for visual, electrical, auditory, or hand signals and signs used to control and manage road traffic

turn signal or indicator light on a vehicle

a set of red, amber, and green lights used to control the movement of vehicles and pedestrians at road junctions

soldier responsible for sending and receiving communications

signal station; signal tower

the ratio of the strength of an electrical or other signal to that of unwanted interference

signal tower; signal box

The analysis, interpretation, and manipulation of signals, such as sound or images

a system of signals or signaling equipment