1. 商业的;贸易的
    Commercial means involving or relating to the buying and selling of goods.

    e.g. Docklands in its heyday was a major centre of industrial and commercial activity...
           港区在其最繁荣的时期曾是主要的工商业活动中心。
    e.g. Attacks were reported on police, vehicles and commercial premises.
           据报道，警察、车辆和商业经营场所均遭到袭击。

2. (组织、活动)营利的，商业化的，偏重利润的
    Commercial organizations and activities are concerned with making money or profits, rather than, for example, with scientific research or providing a public service.

    e.g. British Rail has indeed become more commercial over the past decade...
           过去10年来，英国铁路确实变得更加商业化了。
    e.g. Conservationists in Chile are concerned over the effect of commercial exploitation of forests...
           对森林的商业开发所带来的影响让智利的自然资源保护者们感到忧心忡忡。

3. (产品)商品化的，供市场出售的
    A commercial product is made to be sold to the public.

    e.g. They are the leading manufacturer in both defence and commercial products.
           在军工产品和民用产品的制造方面，他们都处于领先地位。

4. (车辆)商用的
    A commercial vehicle is a vehicle used for carrying goods, or passengers who pay.

    e.g. Commercial vehicles, coaches and lorries are required by law to be fitted with tachographs.
           法律规定商用车辆、长途汽车和卡车要安装转速计。
    e.g. ...the fastest crossing of the Atlantic by a commercial passenger vessel.
           商用客船最快的一次横渡大西洋

5. (电视、广播)靠广告收入维持的，商业性的
    Commercial television and radio are paid for by the broadcasting of advertisements, rather than by the government.

    e.g. ...Classic FM, the first national commercial radio station.
           国内首家商业广播电台——经典调频

6. (电影或音乐)商业化的，迎合大众口味的
    Commercial is used to describe something such as a film or a type of music that it is intended to be popular with the public, and is not very original or of high quality.

commercial的反义词

    e.g. There's a feeling among a lot of people that music has become too commercial.
           很多人都觉得音乐变得过于商业化了。

7. (电视或电台的)商业广告
    A commercial is an advertisement that is broadcast on television or radio.

    e.g. The government has launched a campaign of television commercials and leaflets.
           政府通过电视广告和传单的形式发起了宣传活动。