Haggadah, a system of professedly traditional, mostly fanciful, amplifications of the historical and didactic, as distinct from the legal, portions of Jewish scripture; is a reconstructing and remodelling of both history and dogma; for the Jews seem to have thought, though they were bound to the letter of the Law, that any amount of licence was allowed them in the treatment of history and dogma.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Hagenbach, Karl * Haggai