n.1 a time or season of rejoicing.
2 an anniversary, esp. the 25th or 50th.
3 Jewish Hist. a year of emancipation and restoration, kept every 50 years.
4 RC Ch. a period of remission from the penal consequences of sin, granted under certain conditions for a year usu. at intervals of 25 years.
5 exultant joy.
Etymology: ME f. OF jubil{eacute} f. LL jubilaeus (annus) (year) of jubilee ult. f. Heb. yobel, orig. ram, ram's-horn trumpet