零

(1)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"

(2)重要でない量

(3)a score of zero in tennis or squash; "it was 40 love"

(4)テニスやスカッシュでの0点のスコア

(5)a mathematical element that when added to another number yields the same number

(6)数学の要素で他の数に加えられた場合にその同じ数になるもの