Boyd’s Bible Dictionary:

Concise Bible Dictionary:

A solemn charge by one in authority to another to speak the truth under the obligation of an oath, as when Ahab adjured Micaiah (1 Kings 22:1616And the king said unto him, How many times shall I adjure thee that thou tell me nothing but that which is true in the name of the Lord? (1 Kings 22:16)), and when the high priest adjured our Lord (Matt. 26:6363But Jesus held his peace. And the high priest answered and said unto him, I adjure thee by the living God, that thou tell us whether thou be the Christ, the Son of God. (Matthew 26:63)). Also binding a person under a curse to do or not to do the thing enjoined, as in Joshua 6:2626And Joshua adjured them at that time, saying, Cursed be the man before the Lord, that riseth up and buildeth this city Jericho: he shall lay the foundation thereof in his firstborn, and in his youngest son shall he set up the gates of it. (Joshua 6:26); 1 Samuel 14:2424And the men of Israel were distressed that day: for Saul had adjured the people, saying, Cursed be the man that eateth any food until evening, that I may be avenged on mine enemies. So none of the people tasted any food. (1 Samuel 14:24) (compare also Mark 5:77And cried with a loud voice, and said, What have I to do with thee, Jesus, thou Son of the most high God? I adjure thee by God, that thou torment me not. (Mark 5:7); Acts 19:1313Then certain of the vagabond Jews, exorcists, took upon them to call over them which had evil spirits the name of the Lord Jesus, saying, We adjure you by Jesus whom Paul preacheth. (Acts 19:13)). Also a solemn charge, as in 1 Thessalonians 5:27,27I charge you by the Lord that this epistle be read unto all the holy brethren. (1 Thessalonians 5:27) in the margin.