*- The numerical symbol 0; a cipher.*

*- Mathematics The identity element for addition.*

*- Mathematics A cardinal number indicating the absence of any or all units under consideration.*

*- Mathematics An ordinal number indicating an initial point or origin.*

*- Mathematics An argument at which the value of a function vanishes.*

*- The temperature indicated by the numeral 0 on a thermometer.*

*- A sight setting that enables a firearm to shoot on target.*

*- Informal One having no influence or importance; a nonentity: a manager who was a total zero. *

*- The lowest point: His prospects were approaching zero. *

*- A zero-coupon bond.*

*- Informal Nothing; nil: Today I accomplished zero. *

*- Of, relating to, or being zero.*

*- Having no measurable or otherwise determinable value.*

*- Informal Absent, inoperative, or irrelevant in specified circumstances: "The town has . . . practically no opportunities for amusement, zero culture” ( Robert M. Adams). *

*- Meteorology Designating a ceiling not more than 16 meters (52 feet) high.*

*- Meteorology Limited in horizontal visibility to no more than 55 meters (180 feet).*

*- 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.*

*- To adjust (an instrument or a device) to zero value.*

*- zero in To aim or concentrate firepower on an exact target location.*

*- zero in To adjust the aim or sight of by repeated firings.*

*- zero in To converge intently; close in: The children zeroed in on the display of toys in the store window. *

*- zero out To eliminate (a budget or budget item) by cutting off funding.*

*- zero out To reduce to zero.*

**Z**_{10} - E_{1} - R_{1} - O_{1} - S_{1} has 14 points in Scrabble!

**Z**_{10} - E_{1} - R_{1} - O_{1} - S_{1} has 14 points in Words with Friends!

Found in the OTCWL2014, SOWPODS, ENABLE, and WWF dictionaries