ZERO

(noun) the sight setting that will cause a projectile to hit the center of the target with no wind blowing
(noun) the point on a scale from which positive or negative numerical quantities can be measured
synonyms : zero point
(noun) a quantity of no importance
"it looked like nothing I had ever seen before", "reduced to nil all the work we had done", "we racked up a pathetic goose egg", "it was all for naught", "I didn't hear zilch about it"
synonyms : aught , cipher , cypher , goose egg , nada , naught , nil , nix , nothing , null , zilch , zip , zippo
(noun) a mathematical element that when added to another number yields the same number
synonyms : 0 , cipher , cypher , nought
He did not understand the need for a cipher. -added by naila_inlas
(verb) adjust (as by firing under test conditions) the zero of (a gun)
"He zeroed in his rifle at 200 yards"
synonyms : zero in
(verb) adjust (an instrument or device) to zero value
(adj.) of or relating to the null set (a set with no members)
(adj.) indicating the absence of any or all units under consideration
"a zero score"
synonyms : 0
(adj.) indicating an initial point or origin
(adj.) having no measurable or otherwise determinable value
"the goal is zero population growth"

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