A cipher; nothing.

零；无。

The point on a scale from which reckoning begins, as on a thermometer.

零点(如寒暑表的起点)。

The temperature represented by the zero mark on a thermometer.

零度。

The setting or adjustment of the sight of a firearm that causes it to shoot to point of aim at a desired range.

(依照射程调整弹道的火器瞄准仪的)零位。

An insignificant person or thing; nonentity.

不重要的人或物；子虚乌有。

A state of total absence or neutrality.

完全缺乏；无性状态。

The lowest point; nadir.

最低点；最底点。

Something arbitrarily or conveniently designated zero.

(为了方便)设定为零的事物。

Of, relating to, or being a zero.

零的。

Having no magnitude or quantity; not any.

无。

Having no change or inflection.

没有字形变化的。

Of a cloud ceiling limiting vision to 50 feet(15 meters)or less.

云幕高度小于 50 尺( 15 公尺)的。

Of horizontal visibility limited to 165 feet(50.3 meters) or less.

水平能见度，在 165 尺( 50.3 公尺)以下的。

To determine or adjust the zero of (as a rifle).

使(火器)归零。

To concentrate firepower on the exact range of.

集中射击。

To bring to bear on the exact range of a target.

瞄准。

To adjust fire (as of artillery) on a specific target.

集中射击特定目标(in)。

To move near or to focus attention as if on a target; close.

迫近目标。