1. Eccles. law. The act of con-vening the parties to an action by summoning the defendant.
2. Hist. An agreement or convention; an agreement between two or more persons respecting a legal relation between them. See CONVENTION(1).
“Conventio is a word much used both in Ancient and Modern Law-pleadings, for an Agreement or Covenant.” Thomas Blount, Nomo-Lexicon: A Law-Dictionary (1670).