Signal1. (n.) A sign made for the purpose of giving notice to a person of some occurrence, command, or danger; also, a sign, event, or watchword, which has been agreed upon as the occasion of concerted action.
2. (n.) A token; an indication; a foreshadowing; a sign.
3. (a.) Noticeable; distinguished from what is ordinary; eminent; remarkable; memorable; as, a signal exploit; a signal service; a signal act of benevolence.
4. (a.) of or pertaining to signals, or the use of signals in conveying information; as, a signal flag or officer.
5. (v. t.) To communicate by signals; as, to signal orders.
6. (v. t.) To notify by a signals; to make a signal or signals to; as, to signal a fleet to anchor.
Thesaurus Entries
ALGOL, COBOL, CRT spot, DM display, Doppler signal, EDP, FORTRAN, IF signal, IM display, RF echoes, Roman candle, Teletype, Wirephoto, aid to navigation, alarm, alert, alphabetic data, alphanumeric code, amber light, angular data, announce, arresting, assembler, astonishing, badge, balefire, banner, beacon, beacon fire, beam, beat signal, beat the drum, beckon, bell, bell buoy, binary digit, binary scale, binary system, bit, blink, blinker, blips, blue peter, bounces, broad hint, broadcast, bug, buoy, byte, caution light, celebrated, channel, character, characteristic, clue, command pulses, commands, communicate, communication, communication explosion, communication theory, communicational, communications, compiler, computer code, computer language, computer program, consequential, conspicuous, control signals, controlled quantity, convey, correcting signals, cue, data, data retrieval, data storage, decoding, device, differentia, dip, dip the ensign, display, disseminate, distinctive, distinguished, double-dot display, dress ship, earmark, echo, echo signal, egregious, electronic data processing, eminent, encoding, entropy, error, error signals, esteemed, estimable, exceptional, exchange colors, extraordinary, fabulous, facsimile, famous, fantastic, feedback pulses, feedback signals, film data, flag, flag down, flare, flash, fog bell, fog signal, fog whistle, foghorn, formidable, gentle hint, gesticulate, gesture, get across, get over, give, give a signal, give the nod, give word, glance, glimmer, glimmering, go light, goad, gong buoy, green light, hail, hail and speak, half-mast, hallmark, hand on, heliograph, hexadecimal system, high sign, hint, hoist a banner, idiosyncrasy, illustrious, image, impart, impetus, implication, important, incitement, incredible, index, indicant, indicate, indication, indicator, individual, information, information explosion, information theory, inkling, innuendo, input data, input quantity, insignia, insinuation, instructions, international alphabet flag, international numeral pennant, intimation, keynote, kick, leave word, leer, local oscillator signal, look, machine language, magnetotelephonic, make a sign, make a signal, make known, mark, marked, marker beacon, marvelous, measure, memorable, message, microtelephonic, momentous, monotelephonic, motion, movement, multiple messages, noble, nod, noise, notable, note, noteworthy, noticeable, notify, nudge, numeric data, octal system, of mark, oscillograph data, output data, output quantity, output signal, outstanding, parachute flare, pass, pass along, pass on, peculiar, peculiarity, phototelegraphic, picture, pilot flag, pips, play, poke, polar data, police whistle, prestigious, prick, prominent, prompt, property, punch-card data, quarantine flag, radar signal, radio, radio beacon, radiotelegraphic, raise a cry, random data, rare, reading, rectangular data, red flag, red light, redundancy, reference quantity, reflection, remarkable, rememberable, render, renowned, report