ZERO

Definition

1. verb adjust (an instrument or device) to zero value.
2. verb adjust (as by firing under test conditions) the zero of (a gun). — synonyms: zero_in
3. adjective indicating the absence of any or all units under consideration. — synonyms: 0
4. adjective having no measurable or otherwise determinable value. — synonyms: zero(a)
5. adjective indicating an initial point or origin.
6. adjective of or relating to the null set (a set with no members).
7. noun a quantity of no importance. — synonyms: nothing, nil, nix, nada, null, aught, cipher, cypher
8. noun a mathematical element that when added to another number yields the same number. — synonyms: 0, nought, cipher, cypher
9. noun the point on a scale from which positive or negative numerical quantities can be measured. — synonyms: zero_point
10. noun the sight setting that will cause a projectile to hit the center of the target with no wind blowing.