advert

Compared meaning: an advertisement for a product or service (noun).

比较义项：广告（宣传产品或服务的公告）（名词）。

• advertisement

  The full, formal word; typical in written or official contexts (newspapers, notices, marketing documents) and less common in casual speech, where it is usually shortened.

  完整、正式的说法；常见于书面或正式场合（报纸、公告、营销文件等），口语中较少使用，通常会被缩短。

  The newspaper printed a full-page advertisement for the town's new shopping centre.

  这家报纸为镇上新开的购物中心刊登了一整版广告。

• ad

  The everyday informal short form, especially common in American English and in casual talk about TV, online or pop-up marketing.

  日常口语中最常用的非正式简称，尤其常见于美式英语，以及谈论电视广告、网络广告或弹出式广告的场合。

  I had to close three pop-up ads before the website finally loaded.

  我关掉了三个弹出式广告，网站才终于加载出来。

• advert 本词

  The informal short form used in British English instead of American "ad"; common in everyday spoken and written British contexts, especially for TV or radio.

  英式英语中使用的非正式简称，相当于美式英语的ad；常见于英式日常口语和书面语，尤其用于电视或广播广告。

  He always mutes the telly whenever an advert comes on.

  每次电视上一播广告，他都会把电视静音。

All three are close in meaning, but differ in formality and region. Advertisement is the full, formal word, used in writing. Ad is common informal form, especially in American English, for TV or online. Advert is a British informal form, used instead of American 'ad'.

这三个词在“广告”这个意思上很接近，但正式程度和地域用法不同：advertisement是完整、正式的说法，多用于书面或正式场合；ad是最常见的非正式说法，尤其常见于美式英语口语、电视和网络广告；advert则是英式英语中的非正式说法，相当于美式英语里的ad，美式英语中很少使用。