What is the origin of an idiom 'the jury is still out'?

Answer 1

Court jury trials where the jury was taking a long time to decide the case.

Answer 2

The idiom "the jury is still out" originates from the legal system. In a court trial, the jury decides on a defendant's guilt or innocence. If the jury is still out, it means they have not yet reached a verdict or decision, and the outcome is still uncertain. The phrase has since been used metaphorically to indicate that a definitive conclusion has not yet been reached on a particular matter.