Definition of "turbulent"

The [Washington] Post's proprietor through those turbulent [Watergate] days, Katharine Graham, held a double place in Washington’s hierarchy: at once regal Georgetown hostess and scrappy newshound, ready to hold the establishment to account. That is a very American position.

2013 August 10, Lexington, “Keeping the mighty honest”, in The Economist, volume 408, number 8848