Jubilee, Year of, a year during which it was required that all land which had passed out of the original owner's hands during the 50 years preceding should be restored, all who during that time had been forced to sell their liberty should be released, and all debts contracted in that period should be remitted, a requirement, however, which does not appear to have been very rigorously or regularly observed.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Jubilee * Judæa