Dictionary definition · zero
noun
- a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential"it looked like nothing I had ever seen before"
- a mathematical element that when added to another number yields the same number
- the point on a scale from which positive or negative numerical quantities can be measured
- the sight setting that will cause a projectile to hit the center of the target with no wind blowing
verb
- adjust (an instrument or device) to zero value
- adjust (as by firing under test conditions) the zero of (a gun)"He zeroed in his rifle at 200 yards"
adjective
- indicating the absence of any or all units under consideration"a zero score"
- having no measurable or otherwise determinable value"the goal is zero population growth"
- indicating an initial point or origin
- of or relating to the null set (a set with no members)
Source: Open English WordNet (CC BY 4.0).