signaled

Signaled is the past tense and past participle of the verb signal. It denotes the act of conveying information, instruction, warning, or indication through a signal, gesture, device, or other cue, or the marking of something by a signal. In American English, signaled is the standard spelling; in British English, signalled is common. Grammatical notes: signaled is used with have/has been signaled; the present tense forms are signal (I signal) and signals (he signals).

In computing and telecommunications, signaling refers to the transmission of messages that affect a process, device, or system state. A program may be signaled to terminate by receiving a signal such as SIGTERM; signals can be caught, ignored, or handled by default actions. In Unix-like systems, common signals include SIGINT, SIGTERM, and SIGKILL, each with specific behavior upon delivery.

In electronics and transportation, signaling encompasses the methods by which status, instructions, or warnings are communicated, such as electrical lines carrying a high or low signal level, or railway and traffic signaling systems that indicate when to stop, proceed, or change speed.

Etymology and related terms: signaled derives from signal, from Latin signum. Related concepts include signaling as the general act of conveying information, signal processing as the analysis or manipulation of signals, and signaller or signaler, a person or device responsible for signaling.

See also: signal, signaling, signal processing.