A rhetorical device is a linguistic tool that employs a particular type of sentence structure, sound, or pattern of meaning in order to evoke a particular reaction from an audience. Each rhetorical device is a distinct tool that can be used to construct an argument or make an existing argument more compelling.
A rhetorical device (otherwise known as a stylistic device, a persuasive device or more simply, rhetoric) is a technique or type of language that is used by a speaker or an author for the purpose of evoking a particular reaction from the listener or reader or persuading them to think in a certain way.
