I'm reading "Journey to the Centre of the Earth" by Jules Verne.
In chapter 39: "Man Alive", I came across the following:
His head, which was as big as a buffalo's was half hidden in the tangled growth of his unkempt hair - a positive mane, like that of the primitive elephant.
I want to know the meaning of "positive" mane. The author in an earlier chapter also used it as following:
positive roar; positive statements; positive pleasure; positive whirlpool; positive deluge
(In later chapters as:) positive rout; positively disgraceful
Please help.