What is True Bill?

Legal Definition
an agreement of a grand jury with a prosecuting attorney that an indictment needs to be made against the accused person. "true bill" is stamped on the document.
Legal Definition
Practice. These words are endorsed on a bill of indictment, when a grand jury, after having heard the witnesses for the government, are of opinion that there is sufficient cause to put the defendant on his trial. Formerly, the endorsement was Billa vera, when legal proceedings were in Latin; it is still the practice to write on the back of the bill Ignoramus, when the jury do not find it to be a true bill. Vide Grand Jury.
-- Bouviers Law Dictionary
Legal Definition
A true bill is an indictment approved of by a grand jury. Vide Billa Vera; True Bill.
-- Bouviers Law Dictionary
Legal Definition
An indictment when returned by a grand jury.
-- Ballentine's Law Dictionary