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n. pl. ze·ros or ze·roes
1. The numerical symbol 0; a cipher.
a. The identity element for addition.
b. A cardinal number indicating the absence of any or all units under consideration.
c. An ordinal number indicating an initial point or origin.
d. An argument at which the value of a function vanishes.
3. The temperature indicated by the numeral 0 on a thermometer.
4. A sight setting that enables a firearm to shoot on target.
5. Informal One having no influence or importance; a nonentity: a manager who was a total zero.
6. The lowest point: His prospects were approaching zero.
7. Informal Nothing; nil: Today I accomplished zero.
1. Of, relating to, or being zero.
a. Having no measurable or otherwise determinable value.
b. Informal Not any; no: "The town has ... practically no opportunities for amusement, zero culture" (Robert M. Adams).
a. Designating a ceiling not more than 16 meters (52 feet) high.
b. Limited in horizontal visibility to no more than 55 meters (180 feet).
4. Linguistics Of or relating to a morpheme that is expected by an established, regular paradigm but has no spoken or written form. Moose has a zero plural; that is, its plural is moose.
tr.v. ze·roed, ze·ro·ing, ze·roesPhrasal Verbs:
To adjust (an instrument or a device) to zero value.
a. To aim or concentrate firepower on an exact target location.
b. To adjust the aim or sight of by repeated firings.
2. To converge intently; close in: The children zeroed in on the display of toys in the store window.
1. To reduce to zero.
2. To eliminate (a budget or budget item) by cutting off funding.
[Italian, from alteration of Medieval Latin zephirum, from Arabic ṣifr, nothing, cipher; see cipher.]
1. (Firearms, Gunnery, Ordnance & Artillery) (often foll by on) to bring (a weapon) to bear (on a target), as while firing repeatedly
2. informal (foll by: on) to bring one's attention to bear (on a problem, etc)
3. informal (foll by: on) to converge (upon): the police zeroed in on the site of the crime.
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|Verb||1.||zero in - direct onto a point or target, especially by automatic navigational aids|
|2.||zero in - adjust (as by firing under test conditions) the zero of (a gun); "He zeroed in his rifle at 200 yards"|
1. Informal. A totally insignificant person: