from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The 100th Psalm in the King James Bible and in most modern Catholic versions or the 99th in the Vulgate.
- n. A musical setting of the Jubilate.
- n. The third Sunday after Easter.
- n. A song or an outburst of joy and triumph.
Middle English, from Latin iūbilāte, second person pl. imperative of iūbilāre, to raise a shout of joy, the first word of the psalm.(American Heritage® Dictionary of the English Language, Fourth Edition)