Bad or undesirable; not positive.

不好或不理想；非正面的。

Of a number or temperature: less than zero.

表示数值或温度：小于零。

Of a test or screening: no evidence found; not detected.

用于检测或筛查：未检出；未发现阳性。

Having the electric charge of an electron; not positive.

具有电子的电荷；带负电。

Tending to expect bad outcomes; pessimistic in outlook.

倾向于预期不利结果；悲观的。

A photographic image with light and dark reversed.

明暗反转的摄影底片图像。

An unfavorable point or weakness.

不利之处或弱点。

A quantity less than zero; a negative number.

小于零的量；负数。

A word or particle that expresses denial, like no or not.

表示否定的词或语素，如“不”或“没”。

A refusal or right to veto; the negative vote.

否决或拒绝的权利；反对票。

To reject or veto a proposal.

否决或拒绝一项提议。

To contradict or deny a claim.

反驳或否认某项主张。

To make ineffective or counteract; to neutralize.

使失效或加以抵消；中和。

Used as a radio or official reply meaning no.

通信或正式场合中用于表示“否”。