An advertisement promoting the interests or opinions of a corporate sponsor, often presented in such a way as to resemble an editorial.
An advertisement, as in a magazine, produced so as to resemble an article or editorial.
(ADVERtisement ediTORIAL) A printed or online ad that reads like an editorial but is touting a specific product or service. Advertorials are paid for by the vendor. Depending on how it is written, it can appear as a strong opinion piece or obviously be an ad. Sometimes, people have to read between the lines.