(adjective)
having the ability to express oneself clearly, coherently, and effectively, fluent and eloquent in manner of expression (especially in speech), or characterized by such a manner of expression;
e.g. The politician is very articulate in his speeches.
(adjective)
expressed in meaningfully-arranged syllables or words, or capable of meaningful expression;
e.g. She was barely articulate due to her extreme fear.
(adjective)
characterized by distinct separations or jointed segments;
e.g. This is one of the largest articulate insects that is native to the region.
(verb)
to express a feeling or idea in a clear and coherent manner, to fluently or eloquently put something into words;
e.g. I am sure she will articulate exactly what problems she is facing.
(verb)
to pronounce something distinctly or clearly, in a way that is easy to understand;
e.g. He took time to articulate his words so that he would not be misheard.
(verb)
to give shape, definition, or expression to a concept or theme;
e.g. The movie uses various color schemes to articulate the changes in the protagonist's mood.
(verb)
to become connected or united into a whole, to fit together to form a whole, by or as if by joints;
e.g. These bones articulate together in a hinge joint at the elbow.