The Collaborative International Dictionary of English v.0.48:

Adjure \Ad*jure"\, v. t. [imp. & p. p. Adjured; p. pr. & vb.
   n. Adjuring]. [L. adjurare, adjurdium, to swear to; later,
   to adjure: cf. F. adjurer. See Jury.]
   To charge, bind, or command, solemnly, as if under oath, or
   under the penalty of a curse; to appeal to in the most solemn
   or impressive manner; to entreat earnestly.
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         Joshua adjured them at that time, saying, Cursed be the
         man before the Lord, that riseth up and buildeth this
         city Jericho.                            --Josh. vi.
                                                  26.
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         The high priest . . . said . . . I adjure thee by the
         living God, that thou tell us whether thou be the
         Christ.                                  --Matt. xxvi.
                                                  63.
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         The commissioners adjured them not to let pass so
         favorable an opportunity of securing their liberties.
                                                  --Marshall.
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