definition of
zero

[1] #1 zero n. [nothing, nil, nix, nada, null, aught, cipher, cypher, goose egg, naught, zilch, zip, zippo] 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". wn

[2] #2 zero s. [0] indicating the absence of any or all units under consideration; "a zero score". wn

[3] #3 zero n. [0, nought, cipher, cypher] a mathematical element that when added to another number yields the same number. wn

[4] #4 zero s. having no measurable or otherwise determinable value; "the goal is zero population growth". wn

[5] #5 zero s. indicating an initial point or origin. wn