While Perkins started with my general contention that "There's no clear definition of what a rogue wave is," he went on and gave the best ever eloquent description which anyone read the article can understand:
"A wave typically achieves rogue status not by growing to a certain minimum size but by exceeding the surrounding waves by a certain proportion. The basis for comparison is an oceanographic parameter called significant wave height, which researchers typically calculate by taking the average of the tallest one-third of the waves in a particular patch of ocean. Many scientists define a wave as a rogue if it's 2.2 times as tall as the significant wave height."Two thumbs up for this article!