noun, plural ze·ros, ze·roes.
- the identity element of a group in which the operation is addition.
- (of a function, especially of a function of a complex variable) a point at which a given function, usually a function of a complex variable, has the value zero; a root.
verb (used with object), ze·roed, ze·ro·ing.
- (of an atmospheric ceiling) pertaining to or limiting vertical visibility to 50 feet (15.2 meters) or less.
- of, relating to, or limiting horizontal visibility to 165 feet (50.3 meters) or less.
- to aim directly at (a target).
- to direct one's attention to; focus on; concentrate on.
- to converge on; close in on.
Origin of zero
Examples from the Web for zero
Not quite, but at one point the temperature registered 29 below zero, with 21 inches of snow.Speed Read: The Juiciest Bits From the History of ‘Purple Rain’|Jennie Yabroff|January 1, 2015|DAILY BEAST
The longer someone stays well, the lower their chance of relapsing, although that possibility never becomes zero.
Islamic State brought “peace, autonomy, zero corruption, low crime-rate,” he Tweeted last month.
During the recession net immigration to the U.S. from Mexico fell to zero or less.
In some ways, the Esme Beltagy Center is ground zero for the conflicting social forces buffeting Turkey.Allah, Mom, and Baklava: Turkish President Uses Mothers and Kids as Political Pawns|Xanthe Ackerman|November 27, 2014|DAILY BEAST
Idiots are found with practically zero ability in rote memory.The Science of Human Nature|William Henry Pyle
At zero minus sixteen hours Rick stood at the base of the huge rocket and looked up, studying every inch of it.The Scarlet Lake Mystery|Harold Leland Goodwin
Zero is the bottom of the spondulix scale fer me, although the thummometer seems to prove it ain't necessarily thus.Yellowstone Nights|Herbert Quick
A furious wind threshed the earth; the mercury hovered about the zero mark.The Price of the Prairie|Margaret Hill McCarter
Men—hatless, coatless, and gasping—lay in the shade of that station where only a few months ago the glass stood at 30 below zero.Letters of Travel (1892-1913)|Rudyard Kipling
British Dictionary definitions for zero
noun plural -ros or -roes
- the temperature, pressure, etc, that registers a reading of zero on a scale
- the value of a variable, such as temperature, obtained under specified conditions
- the cardinal number of a set with no members
- the identity element of addition
- an allomorph with no phonetic realization, as the plural marker of English sheep
- (as modifier)a zero form
- (of a cloud ceiling) limiting visibility to 15 metres (50 feet) or less
- (of horizontal visibility) limited to 50 metres (165 feet) or less
verb -roes, -roing or -roed
Word Origin for zero
Word Origin and History for zero (1 of 2)
c.1600, from Italian zero, from Medieval Latin zephirum, from Arabic sifr "cipher," translation of Sanskrit sunya-m "empty place, desert, naught" (see cipher (n.)). A brief history of the invention of "zero" can be found here. Meaning "worthless person" is recorded from 1813. Zero tolerance first recorded 1972, originally U.S. political language.
Word Origin and History for zero (1 of 2)
in zero in, 1944, from zero (n.); the image is from instrument adjustments.
Medicine definitions for zero
n. pl. ze•ros
Science definitions for zero
A Closer Look
Although the origin of zero is controversial, some historians believe that it was invented by the Babylonians in about 500 BCE. In the sixth century, it was discovered by the Hindus and Chinese, and 700 years later, it reached the Western world via the Arabs. Zero is the only integer (whole number) that is neither positive nor negative. In a sense, zero makes negative numbers possible, as a negative number added to its positive counterpart always equals zero. When zero is added to or subtracted from a number, it leaves the number at its original value. Zero is essential as a position holder in the system known as positional notation. In the number 203, for example, there are two hundreds, zero tens, and three ones. Zero indicates that the value of the tens place is zero. In the number 1024, zero indicates that the value of the hundreds place is zero. Scientists use the term absolute zero (0° Kelvin) to refer to the (unattainable) theoretically lowest possible temperature, at which the kinetic energy of molecules is zero.