1. a solemn and earnest appeal to someone to do something;
The Collaborative International Dictionary of English v.0.48:
Adjuration \Ad`ju*ra"tion\, n. [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
WordNet (r) 3.0 (2006):
n 1: a solemn and earnest appeal to someone to do something
Easton's 1897 Bible Dictionary:
a solemn appeal whereby one person imposes on another the
obligation of speaking or acting as if under an oath (1 Sam.
14:24; Josh. 6:26; 1 Kings 22:16).
We have in the New Testament a striking example of this (Matt.
26:63; Mark 5:7), where the high priest calls upon Christ to
avow his true character. It would seem that in such a case the
person so adjured could not refuse to give an answer.
The word "adjure", i.e., cause to swear is used with reference
to the casting out of demons (Acts 19:13).