The term "advertise" does not refer to which of the following?

In the context of advertising, the term typically encompasses promotional activities aimed at informing or persuading a target audience regarding products, services, or business offerings. Among the options provided, articles of clothing generally do not fall within the traditional scope or purpose of advertising. While clothing can certainly be branded and used in marketing campaigns, they aren't inherently a medium or tool used for advertising as the other options are.

Business cards, contracts, and signs on vehicles are all direct forms of communication specifically designed to promote a business or service. Business cards provide essential contact information, contracts may serve to formalize agreements in a business context, and signs on vehicles serve as mobile advertisements that capture attention in various locations. In contrast, articles of clothing do not serve the primary function of advertising even though they might be used in a promotional context.