a.

1. 商业的；商务的
   a commercial traveller

   旅行推销员

2. 营利本位的；商业性的
   commercial records

   商业性的唱片

3. 质量低劣的；供工业用的
   commercial sulphuric acid

   工业用硫酸

4. （广播、电视节目）由广告收入支付的
5. 商业广告性的

n.

1. （电视、广播中的）商业广告[C]
   The TV show was interrupted by too many commercials.

   那档电视节目插进的商业广告太多了，不断被打断。

adj.

1. concerned with or engaged in commerce.
2. making or intended to make a profit.
3. (of television or radio) funded by the revenue from broadcast advertisements.
4. (of chemicals) supplied in bulk and not of the highest purity.

n.