signalとは

意味・読み方・使い方

別の表記

• signall

語源

From Old French segnal, seignal or Medieval Latin signāle, noun use of the neuter of Late Latin signālis, from Latin signum.

発音

• enPR: sĭgʹnəl, IPA^(key): /ˈsɪɡnəl/
• ハイフネーション: sig‧nal

名詞

signal (複数形 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.
   • 1667, John Milton, “Book V”, in Paradise Lost. A Poem Written in Ten Books, London: Printed [by Samuel Simmons], and are to be sold by Peter Parker […] [a]nd by Robert Boulter […] [a]nd Matthias Walker, […], OCLC 228722708; republished as Paradise Lost in Ten Books: The Text Exactly Reproduced from the First Edition of 1667: […], London: Basil Montagu Pickering […], 1873, OCLC 230729554:

     All obeyed / The wonted signal and superior voice / Of this great potentate.

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.

   He whistled to signal that we should stop.
   

7. A token; an indication; a foreshadowing; a sign.
   • c. 1593, William Shakespeare, “The Tragedy of Richard the Third: […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358, [Act V, scene iii]:

     The weary sun […] / Gives signal of a goodly day to-morrow.

   • (Can we date this quote by Daniel Defoe かつ provide title, author's full name, かつ other details?)

     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

反意語

• (useful information): noise

派生語

参考

• tocsin

動詞

signal (third-person singular simple present signals, present participle (英国用法) signalling or (米国用法) signaling, simple past and past participle (英国用法) signalled or (米国用法) signaled)

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

   I signalled my acquiescence with a nod.

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

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

派生語

• missignal
• oversignal
• undersignal

形容詞

signal (not comparable)

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

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

   • 1671, John Milton, Samson Agonistes:

     As signal now in low, dejected state / As erst in highest, behold him where he lies.

同意語

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

関連する語

• signature (adjective)

アナグラム

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