a.

1. 中立的；中立国的；中立地带的
   He remained neutral during the debate.

   他在辩论中保持中立。

2. 不确定的，模糊的
   I waited, but her eyes were neutral.

   我等着她的反应，但她的眼睛没有露出情感有什么变化。

3. 非彩色的，略带灰色的
   White is a neutral color.

   白色是中性色。

   The water was of a pale, neutral color.

   这水是一片淡灰色。

4. 【化】中性的
   It is a neutral salt.

   这是一种中性盐。

5. 【物】不带电的
   Cut back the covers of the neutral and live wires about one inch.

   将带电和不带电的电线头上的包皮割去约一英寸。

6. 【生】无性的
7. 【机】空档的

n.

1. 中立者，中立国[C]
2. 非彩色[U][C]
3. 【机】空档[U]
   When you start the car, make sure it is in neutral.

   确定在空档才发动车子。

   He pushed the handle into neutral.

   他将手柄扳到空挡。

adj.

1. not supporting either side in a conflict or dispute; impartial.
   ▸belonging to an impartial state or group.
2. dispassionate or inoffensive.
3. of or denoting a pale grey, cream, or beige colour.
4. Chemistry  neither acid nor alkaline; having a pH of about 7.
5. electrically neither positive nor negative.

n.

1. an impartial state or person.
2. a neutral colour or shade.
3. a disengaged position of gears.
4. an electrically neutral point, terminal, etc.