Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
A joyful shout or clangour of trumpets, the name of the great semi-centennial festival of the Hebrews. It lasted for a year. During this year the land was to be fallow, and the Israelites were only permitted to gather the spontaneous produce of the fields (Lev. 25:11, 12). All landed property during that year reverted to its original owner (25:13-34, 27:16-24), and all who were slaves were set free (25:39-54), and all debts were remitted.
The return of the jubilee year was proclaimed by a blast of trumpets which sounded throughout the land. There is no record in Scripture of the actual observance of this festival, but there are numerous allusions (Isa. 5:7, 8, 9, 10, 61:1, 2; Ezek. 7:12, 13; Neh. 5; 2 Chr. 36:21) which place it beyond a doubt that it was observed.
The advantages of this institution were manifold. "