n.

1. 规章；规则，规定；条例[C]
   He was fined for breaking traffic regulations.

   他因违反交通规则而被罚款。

2. 管理；调整，调节；校准[U]
   the regulation of heat

   调节暖气

a.

1. 标准的；正规的，正式的
   drive at a regulation speed

   按规定速度行驶

2. 普通的，一般的

n.

1. a rule or directive made and maintained by an authority.
   ▸ [as modifier] in accordance with regulations.
   ▸ [as modifier] informal of a familiar or predictable type.
2. the action or process of regulating or being regulated.