Definition of "grizzly"

The walls were entirely hidden by bookshelves, or by cases containing rare specimens of fossil bones and reptile skeletons. Here was a grizzly crocodile, its teeth white and sharp as when they glistened in the waters of the Nile;...

1837, L[etitia] E[lizabeth] L[andon], “Age and Youth”, in Ethel Churchill: Or, The Two Brides. […], volume I, London: Henry Colburn, […], page 10

This after Taliban militants led a grizzly campaign of attacks, including beheadings, kidnappings and the destruction of dozens of girls' schools.

2009 February 5, Campbell Brown, “Commentary: Pakistan gives in to terrorists”, in CNN‎