What does adjuration mean?
The definition of adjuration
Ad`ju*ra”tion, n.
Etym: [L. adjuratio, fr. adjurare: cf. F. adjuration. See Adjure.]

1 The act of adjuring; a solemn charging on oath, or under the penalty of a curse; an earnest appeal. What an accusation could not effect, an adjuration shall. Bp. Hall.
2 The form of oath or appeal. Persons who . . . made use of prayer and adjurations. Addison.