|Noah Webster's Dictionary|
(adv.) In a solid manner; densely; compactly; firmly; truly.
Solidly (1 Occurrence)
Ezra 6:3 In the first year of king Cyrus, king Cyrus made a decree concerning the house of God at Jerusalem: Let the house be built for a place where they offer sacrifices, and let its foundations be solidly laid; its height sixty cubits, its breadth sixty cubits, (DBY)