ZEROとは 意味・読み方・使い方

語源

Collectively borrowed from Early Modern Spanish zero, Middle French zero, and (their etymon) Old Italian zero, from Medieval Latin zēphirum, from Arabic صِفْر (ṣifr, “nothing; cipher”), itself calqued from Sanskrit शून्य (śūnyá, “void; nothingness”). Doublet of cipher and chiffre. Cognate with Spanish cero and French zéro.

発音

• (Received Pronunciation) IPA: /ˈzɪəɹəʊ/
• (General American) enPR: zĭʹrō, zēʹrō, IPA: /ˈzɪɹoʊ/, /ˈziɹoʊ/
• (General Australian) IPA: /ˈzɪə.ɹəʉ/
• (New Zealand) IPA: /ˈzɪə.ɹaʉ/
• ハイフネーション: ze‧ro
• 韻: -ɪəɹəʊ, -ɪɹəʊ, -iːɹəʊ

数詞

zero

1. The cardinal number occurring before one and that denotes no quantity or amount at all, represented in Arabic numerals as 0.

   The conductor waited until the passenger count was zero.

   A cheque for zero dollars and zero cents crashed the computers on division by zero.

   • 2024 July 22, Nimi Princewill, “Uganda’s President Museveni warns citizens they are ‘playing with fire’ over planned protests”, in CNN‎:

     Last year, it scored 26 on Transparency International’s Corruption Perceptions Index which ranks countries on a scale of zero to 100, with zero meaning “highly corrupt” and 100 signifying that a country is “very clean.”

   • 2025 May 14, Andy Comfort, “Holding out for a zero...”, in RAIL, number 1035, page 58:

     "A zero itself is nothing, but without a zero you cannot count anything. Therefore, a zero is something, yet zero."
     These words of wisdom from the Dalai Lama might not have been in the minds of planners and engineers when designing new railway station platforms, but for several main line stations, zero is indeed something. Eight stations in the UK now operate a Platform 0 - from Cardiff to Kings Cross, Doncaster and Haymarket.

使用する際の注意点

• In an adjectival sense, used with the plural of a countable noun or with an uncountable noun:

  I have zero dollars and zero food.

同意語

派生語

派生した語

• → Japanese: ゼロ
• → Korean: 제로 (jero)
• → Tokelauan: helo

参考

• Table of cardinal numbers 0 to 9 in various languages

名詞

zero (countable and uncountable, plural zeros or zeroes)

1. The numeric symbol that represents the cardinal number zero.

   In unary and k-adic notation in general, zero is the empty string.

   Write 0.0 to indicate a floating point number rather than the integer zero.

   The zero sign in American Sign Language is considered rude in some cultures.

2. The digit 0 in the decimal, binary, and all other base numbering systems.

   One million has six zeroes.

   • 2007 September 11, John Markoff, “Redefining the Architecture of Memory”, in The New York Times‎, archived from the original on 9 November 2020:

     His idea is to stand billions of ultrafine wire loops around the edge of a silicon chip — hence the name racetrack — and use electric current to slide infinitesimally small magnets up and down along each of the wires to be read and written as digital ones and zeros.

   • 2008 March 2, Tanya Khovanova, “Autobiographical Numbers”, in arXiv‎, page 1‎:

     Here is the formal definition: an autobiographical number is a number N such that the first digit of N counts how many zeroes are in N, the second digit counts how many ones are in N and so on. In our example, 1210 has 1 zero, 2 ones, 1 two and 0 threes.

   • 2024 January 4, Matthew Sparkes, “First working graphene semiconductor could lead to faster computers”, in New Scientist‎, retrieved 18 January 2024:

     This effectively allows switching on and off of the flow of current, so it is either conducting or not conducting, creating the binary system of zeroes and ones used in digital computers.

3. (informal, uncountable) Nothing, or none.

   The shipment was lost, so they had zero in stock.

   He knows zero about humour.

   In the end, all of our hard work amounted to zero.

4. The value of a magnitude corresponding to the cardinal number zero.

   The electromagnetic field does not drop all of the way to zero before a reversal.

   • 2013 July 6, “The rise of smart beta”, in The Economist‎, volume 408, number 8843, archived from the original on 1 April 2019, page 68:

     Investors face a quandary. Cash offers a return of virtually zero in many developed countries; government-bond yields may have risen in recent weeks but they are still unattractive. Equities have suffered two big bear markets since 2000 and are wobbling again. It is hardly surprising that pension funds, insurers and endowments are searching for new sources of return.

5. The point on a scale at which numbering or measurement originates.

   The temperature outside is ten degrees below zero.

6. (mathematics) A value of the independent variables of a function, for which the function is equal to zero.

   The zeroes of a polynomial are its roots by the fundamental theorem of algebra.

   The derivative of a continuous, differentiable function that twice crosses the axis must have a zero.

   The nontrivial zeros of the Riemann zeta function may all lie on the critical line.

   • 2006, Ivan Francis Wilde, Lecture Notes on Complex Analysis, Imperial College Press, page 153:

     As the next example shows, the set of zeros may well have a limit point not belonging to the domain.

7. (mathematics, algebra) The additive identity element of a monoid or greater algebraic structure, particularly a group or ring.

   Since a commutative zero is the inverse of any additive identity, it must be unique when it exists.

   The zero (of a ring or field) has the property that the product of the zero with any element yields the zero.

   The quotient ring over a maximal ideal is a field with a single zero element.

8. (slang) A person of little or no importance.

   They rudely treated him like a zero.

9. (military, usually capitalized) A Mitsubishi A6M Zero, a long range fighter aircraft operated by the Imperial Japanese Navy Air Service from 1940 to 1945.
   • 1971, Lyndon Johnson, “The New Age of Regionalism”, in The Vantage Point‎, Holt, Reinhart & Winston, →ISBN, →LCCN, →OCLC, page 361:

     The visit to Townsville was filled with nostalgia for me. I remembered very well staying there on June 8, 1942. I shared a room with a brave and friendly officer, Colonel Francis Stevens. Early the next morning we flew to Port Moresby in New Guinea, and from there we took off in separate planes. Colonel Stevens never returned from that flight; his plane was shot down by a Japanese Zero.

10. A setting of calibrated instruments such as a firearm, corresponding to a zero value.
11. (finance) A security which has a zero coupon (paying no periodic interest).

    The takeovers were financed by issuing zeroes.

同意語

• (numeric symbol zero): cipher
• (digit zero): slashed zero
• (point of origin on a scale): origin, zero point
• (lowest point): nadir
• (negligible or irrelevant amount): naught, nil, nothing, nought, nowt, null, (informal) bugger all, (informal) fuck all, nada, sod all, sweet FA, sweet Fanny Adams, zilch, zip
• (person of little importance): cipher, nobody, nonentity
• (value of a function’s variables at zero): root
• (identity element of a monoid): additive identity

反意語

• (antonym(s) of “value of a function's variables at zero”): pole

下位語

Holonyms

• (value of a function's variables at zero): kernel

派生語

限定詞

zero

1. Synonym of no.

   She showed zero respect.

   • 2018 May 4, Tom English, “Steven Gerrard: A 'seriously clever or recklessly stupid' Rangers appointment”, in BBC Sport‎:

     You have to salute Gerrard's bravery in accepting the challenge of trying to turn Rangers around given that he has zero experience in senior management. Immortality beckons if he does it.

形容詞

zero (not comparable)

1. (meteorology) Of a cloud ceiling, limiting vision to 50 feet (15 meters) or less.
2. (meteorology) Of horizontal visibility, limited to 165 feet (50.3 meters) or less.
3. (linguistics) Present at an abstract level, but not realized in the surface form.

   The stem of "kobieta" with the zero ending is "kobiet".

4. (postpositive) Used in the names of foodstuffs, especially beverages, to indicate a version with no calories

同意語

• (informal: virtually none): no

派生語

• zero growth
• zero tolerance

動詞

zero (third-person singular simple present zeroes or zeros, present participle zeroing, simple past and past participle zeroed)

1. (transitive) To set some amount to be zero.

   They tried to zero the budget by the end of the quarter.

   The bill was over $400, but the server zeroed it out as a gesture of gratitude.

   Results were inconsistent because an array wasn’t zeroed during initialization.

   Zero the fluorometer with the same solvent used in extraction.

   George parked in space 34, zeroed the trip meter, closed and locked his car, then went back to the guard shack.

2. To disappear or make something disappear.
   • 1997, Tom Clancy, Executive Orders, page 340:

     Traffic on the encrypted channels used by senior Iraqi generals had peaked and zeroed, then peaked again, and zeroed again.

   • 2001, Mark Pesce, “True Magic”, in James Frenkel, editor, True Names by Vernor Vinge and the Opening of the Cyberspace Frontier:

     They discovered the object code for the simulator that was DON, and zeroed it. DON — or his creator — was clever and had planted many copies,

   • 2004, Anna Maxted, Being Committed, page 358:

     If I zeroed Jack, I'd get by So I'd erased him, pretended the last few months had never happened.

3. To adjust until the variance is reduced to an acceptably low amount.

   The soldier took his gun to the shooting range to zero its aim.

同意語

• (to set to zero): tare
• (to cause to be zero): zero out

派生語

• zero in
• zero in on
• zero out

参照

名詞

zērō

1. dative/ablative singular of zērum