a.

1. 自动的，自动装置的
   This washing-machine is fully automatic.

   这台洗衣机是全自动的。

2. 习惯性的，无意识的
3. 必然的；当然的
   All the employees expect an automatic increase in pay every year.

   所有的员工都期待每年工资自然增长。

4. （洗衣粉）适用于全自动洗衣机的

n.[C]

1. 自动机械；自动变速器；自动排档汽车
2. 自动手枪（或步枪等）

adj.

1. (of a device or process) working by itself with little or no direct human control.
   ▸(of a firearm) self-loading and able to fire continuously.
2. done or occurring without conscious thought.
3. (of a penalty or legal sanction) necessary and inevitable, as a result of a fixed rule or particular set of circumstances.

n.