Steady in application to business; constant in effort or exertion to accomplish what is undertaken; assiduous; attentive; industrious; not idle or negligent; applied to persons. Seest thou a man diligent in his business? He shall stand before kings. Proverbs 22:29.

Steadily applied; prosecuted with care and constant effort; careful; assiduous; as, make diligent search. The judges shall make diligent inquisition. Deuteronomy 19:18.