Dictionary
4 ENTRIES FOUND:

1zero

noun ze·ro \ˈzē-(ˌ)rō, ˈzir-(ˌ)ō\

: the number 0

: the temperature shown by the zero mark on a thermometer

: nothing at all

plural zeros also zeroes

Full Definition of ZERO

1
a :  the arithmetical symbol 0 or 0̸ denoting the absence of all magnitude or quantity
b :  additive identity; specifically :  the number between the set of all negative numbers and the set of all positive numbers
c :  a value of an independent variable that makes a function equal to zero <+2 and −2 are zeros of f(x)=x2−4>
2
— see number table
3
a (1) :  the point of departure in reckoning; specifically :  the point from which the graduation of a scale (as of a thermometer) begins (2) :  the temperature represented by the zero mark on a thermometer
b :  the setting or adjustment of the sights of a firearm that causes it to shoot to point of aim at a desired range
4
:  an insignificant person or thing :  nonentity
5
a :  a state of total absence or neutrality
b :  the lowest point :  nadir
6
:  something arbitrarily or conveniently designated zero

Examples of ZERO

  1. Two minus two equals zero.
  2. It's supposed to fall below zero tonight.
  3. The temperature is 10° above zero.
  4. They are working to reduce the mortality rate to zero.

Origin of ZERO

French or Italian; French zéro, from Italian zero, from Medieval Latin zephirum, from Arabic ṣifr
First Known Use: 1598

Other Number-Related Terms

jubilee, myriad, quarantine, score, twain

2zero

adjective

: not any

Full Definition of ZERO

1
a :  of, relating to, or being a zero
b :  having no magnitude or quantity :  not any <zero growth> <zero tolerance>
c (1) :  having no phonetic manifestation <the zero modification in the past tense of cut>
(2) :  having no modified inflectional form <a zero plural>
2
a of a cloud ceiling :  limiting vision to 50 feet (15 meters) or less
b of horizontal visibility :  limited to 165 feet (50.3 meters) or less

First Known Use of ZERO

1810

3zero

verb

: to set (a measuring device, such as a scale) so that it reads 0

Full Definition of ZERO

transitive verb
1
:  to determine or adjust the zero of (as a rifle)
2
a :  to concentrate firepower on the exact range of —usually used with in
b :  to bring to bear on the exact range of a target —usually used with in
intransitive verb
1
:  to adjust fire on a specific target —usually used with in
2
:  to close in on or focus attention on an objective —usually used with in <investigators are zeroing in on a suspect>

First Known Use of ZERO

1913

zero

noun ze·ro \ˈzē-(ˌ)rō, ˈzi(ə)r-(ˌ)ō\   (Medical Dictionary)
plural zeros also zeroes

Medical Definition of ZERO

1
:  the arithmetical symbol 0 or 0̸ denoting the absence of all magnitude or quantity
2
a :  the point of departure in reckoning; specifically :  the point from which the graduation of a scale (as of a thermometer) begins b :  the temperature represented by the zero mark on a thermometer

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