The Collaborative International Dictionary
Sponsion
Sponsion \Spon"sion\ (-sh[u^]n), n. [L. sponsio, fr. spondere, sponsum, to promise solemnly.]
The act of becoming surety for another.
(Internat. Law) An act or engagement on behalf of a state, by an agent not specially authorized for the purpose, or by one who exceeds the limits of authority.
Wiktionary
sponsion
n. 1 The act of becoming surety for another. 2 An act or engagement on behalf of a state, by an agent not specially authorized for the purpose, or by one who exceeds the limits of authority.