zero

nouns

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"
aught, cipher, cypher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo
a mathematical element that when added to another number yields the same number
0, cipher, cypher, nought, zero
the point on a scale from which positive or negative numerical quantities can be measured
zero, zero point
the sight setting that will cause a projectile to hit the center of the target with no wind blowing
zero
is a type of (narrower)
the adjustment of a gunsight for elevation and windage on a particular range under favorable light conditions
sight setting

verbs

adjust (an instrument or device) to zero value
zero
is a type of (narrower)
alter or regulate so as to achieve accuracy or conform to a standard
"Adjust the clock, please"; "correct the alignment of the front wheels"
adjust, correct, set
adjust (as by firing under test conditions) the zero of (a gun)
"He zeroed in his rifle at 200 yards"
zero, zero in

adjectives

indicating the absence of any or all units under consideration
"a zero score"
0, zero
having no measurable or otherwise determinable value
"the goal is zero population growth"
zero
is similar to
quantifier; used with either mass nouns or plural count nouns for indicating a complete or almost complete lack or zero quantity of
"we have no bananas"; "no eggs left and no money to buy any"; "have you no decency?"; "did it with no help"; "I'll get you there in no time"
no
indicating an initial point or origin
zero
is similar to
being or denoting a numerical order in a series
"ordinal numbers"; "held an ordinal rank of seventh"
ordinal
of or relating to the null set (a set with no members)
zero
pertains to
null set