What is the meaning of Articulated?

simple past and past participle of articulate

Constructed with one or more pivoted joints which allow bending of an otherwise rigid structure.

Of a vehicle, composed of component parts each with its own wheels and chassis, e.g. an articulated lorry, articulated bus, or certain kinds of streetcars and trains.

Qualified by an article

An articulated vehicle, such as a locomotive.

Source: wiktionary.org