What is Eat Inde Sine Die?

Legal Definition
Words used on an acquittal, or when a prisoner is to be discharged, that he may go without day, that is, that he be dismissed. Dane's Ab. Index, h. t.
-- Bouviers Law Dictionary
Legal Definition
In criminal practice. Words used on the acquittal of a defendant, that he may go thence without a day, i. e., be dismissed without any further continuance or adjournment.
-- Black's Law Dictionary
Legal Definition
-- Ballentine's Law Dictionary