[see -IST.]
1. A member of a convention or assembly.
1823. Blackw. Mag., XIV. 550. Such politicians as the Dublin Conventionists.
1866. Pall Mall G., No. 506. 916/1. The Philadelphia Convention The Conventionists.
† 2. One who enters into a convention or contract.
1768. Sterne, Sent. Journ. (1775), 17. The buyer cannot go forth with the seller thereof into the street to terminate the difference betwixt them, but he instantly views his conventionist with the same sort of eye, as if he was going to fight a duel.