Eldest means: Scholars attempt to bring back the joy of reading Thesaurus to younger generations by attaching characters to it and occasional events. We know that the book’s cover says it was written in Christopher Paolini.
(in Open Dictionary, added by Devin Frey)

What else does Eldest mean?

Christopher Paolini’s sequel to Eragon, and the second in his Inheritance series. It’s much better than the original.
(in Open Dictionary, added by Ignacio Harding)

Seniority or age is the greatest.
(in Merlin Dictionary)