different between signal vs omnidirectional

English

Alternative forms

• signall

Etymology

From Old French segnal, seignal or Medieval Latin sign?le; noun use of the neuter of Late Latin sign?lis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s).

Pronunciation

• enPR: s?g?n?l, IPA^(key): /?s??n?l/
• Hyphenation: sig?nal

Noun

signal (plural signals)

1. A sequence of states representing an encoded message in a communication channel.
2. Any variation of a quantity or change in an entity over time that conveys information upon detection.
3. A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
4. An on-off light, semaphore, or other device used to give an indication to another person.
5. (of a radio, TV, telephone, internet, etc.) An electromagnetic action, normally a voltage that is a function of time, that conveys the information of the radio or TV program or of communication with another party.

   My mobile phone can't get a signal in the railway station.

6. An action, change or process done to convey information and thus reduce uncertainty.
7. A token; an indication; a foreshadowing; a sign.
   • 1722, Daniel Defoe, A Journal of the Plague Year

     There was not the least signal of the calamity to be seen.

8. Useful information, as opposed to noise.
9. (computing, Unix) A simple interprocess communication used to notify a process or thread of an occurrence.
10. (biochemistry) A signalling interaction between cells

Antonyms

• (useful information): noise

Derived terms

Translations

See also

• tocsin

Verb

signal (third-person singular simple present signals, present participle (UK) signalling or (US) signaling, simple past and past participle (UK) signalled or (US) signaled)

1. (transitive, intransitive) To indicate; to convey or communicate by a signal.

2. (transitive) To communicate with (a person or system) by a signal.

   Seeing the flames, he ran to the control room and signalled headquarters.

Derived terms

• missignal
• oversignal
• undersignal

Translations

Adjective

signal (not comparable)

1. Standing above others in rank, importance, or achievement.

   a signal exploit; a signal service; a signal act of benevolence

Synonyms

• eminent, noteworthy, significant; see also Thesaurus:important or Thesaurus:notable

Related terms

• signature (adjective)

Anagrams

• Saling, algins, aligns, lasing, liangs, lingas

Danish

Etymology

From Medieval Latin signale

Noun

signal n (singular definite signalet, plural indefinite signaler)

1. a signal

References

• “signal” in Den Danske Ordbog

French

Etymology

Re-latinization of Old French segnal, from Medieval Latin signale, from Late Latin sign?lis, from Latin signum.

Pronunciation

• IPA^(key): /si.?al/

Noun

signal m (plural signaux)

1. signal

Related terms

• signe

Further reading

• “signal” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Anagrams

• lignas

Norwegian Bokmål

Etymology

From Medieval Latin signale

Noun

signal n (definite singular signalet, indefinite plural signal or signaler, definite plural signala or signalene)

1. a signal

Derived terms

References

• “signal” in The Bokmål Dictionary.

Norwegian Nynorsk

Etymology

From Medieval Latin signale

Noun

signal n (definite singular signalet, indefinite plural signal, definite plural signala)

1. a signal

Derived terms

References

• “signal” in The Nynorsk Dictionary.

Romanian

Etymology

From French signal.

Noun

signal n (plural signale)

1. signal

Declension

Serbo-Croatian

Etymology

From German Signal, from Medieval Latin signale, from Latin signum.

Pronunciation

• IPA^(key): /s??na?l/
• Hyphenation: sig?nal

Noun

sìgn?l m (Cyrillic spelling ???????)

1. signal

Declension

References

• “signal” in Hrvatski jezi?ni portal

Swedish

Pronunciation

Noun

signal c

1. a signal

Declension

Anagrams

• inslag, ligans, singla, slinga

Vilamovian

Etymology

From Old French segnal, seignal or Medieval Latin sign?le, noun use of the neuter of Late Latin sign?lis, from Latin signum.

Pronunciation

Noun

signal n (plural signale)

1. signal

English

Etymology

omni- +? directional

Pronunciation

• Hyphenation: om?ni?dir?ec?tion?al

Adjective

omnidirectional (not comparable)

1. In every direction, especially of a radio system capable of transmitting or receiving signals in all directions, or of a microphone capable of detecting sound from all directions.

   An omnidirectional radio beacon.

2. (physics, electrical engineering) Having a ring-shaped radiation pattern, with equal radiation in all azimuthal directions.
   • 2004, Harold Davis, Absolute Beginner's Guide to Wi-Fi Wireless Networking, Que Publishing ?ISBN, page 227

     The radiation pattern of an omnidirectional antenna looks like a doughnut, with the antenna in the center of the doughnut, as depicted in Figure 17.1.

Usage notes

Because true omnidirectionality is impossible for individual antennas, omnidirectional is generally used in electrical engineering contexts to refer to antennas that can receive signals in all directions in the azimuthal plane. In these contexts, a hypothetical antenna that radiates in all directions equally is called isotropic.

Antonyms

• unidirectional

Translations

See also

• isotropic

References