What is "explainer"

Usage examples of "explainer".

I now live in a world where every single reporter, shaper and explainer of current events and public affairs would, in his or her heart of hearts, really much rather be writing an Arnold Schwarzenegger script.

Willie was a tendentious explainer, who regarded Johnny Hay as a somewhat dull-witted playmate.

Relativity is a piece of knowledge I’ve always longed to understand, a big piece, but the explainers tend to go too fast or else they skip over a step they assume their audience has already absorbed.

Earthlings are the great explainers, explaining why this event is structured as it is, telling how other events may be achieved or avoided.