n a quantity of no importance
n a mathematical element that when added to another number yields the same number
n the point on a scale from which positive or negative numerical quantities can be measured
n the sight setting that will cause a projectile to hit the center of the target with no wind blowing
v adjust (an instrument or device) to zero value
v adjust (as by firing under test conditions) the zero of (a gun)
零号, 零, 零点, 最低点, 零度, 零位, 无, 乌有, 无足轻重的人, 没价值的东西