Justiciary \Jus*ti"ci*a*ry\, n. [Cf. LL. justitiarius, F. justicier. See {Justice}.] (Old Eng. Law) An old name for the judges of the higher English courts. Note: The chief justiciary, or justiciar, in early English history, was not only the chief justice of the kingdom, but also ex officio regent in the king's absence. {Court of justiciary} (Scots Law), the supreme criminal court, having jurisdiction over the whole of Scotland.