every fiftieth year, being the year following the completion of each seventh sabbath of years, at which time all the slaves of hebrew blood were liberated, and all lands which had been alienated during the whole period reverted to their former owners.-the joyful commemoration held on the fiftieth anniversary of any event; as, the jubilee of queen victoria's reign; the jubilee of the american board of missions.-a church solemnity or ceremony celebrated at rome, at stated intervals, originally of one hundred years, but latterly of twenty-five; a plenary and extraordinary indulgence grated by the sovereign pontiff to the universal church. one invariable condition of granting this indulgence is the confession of sins and receiving of the eucharist.-a season of general joy.-a state of joy or exultation.