Relating to the sphere of governance, with connotations of deference or even awe on the part of the governed or megalomania on the part of the governing.
“During my researches in the leviathanic histories, I stumbled upon an ancient Dutch volume, which, by the musty whaling smell of it, I knew must be about whalers.”
“Cuvier pronounced these fragments to have belonged to some utterly unknown Leviathanic species.”
“There is a Leviathanic Museum, they tell me, in Hull, England, one of the whaling ports of that country, where they have some fine specimens of fin-backs and other whales.”
“The show opens with a leviathan fountain that stretches 12 feet across the gallery floor and fills the room with the deafening echo of running water.”