[f. STATE v. + -ER1.] One who states. Average stater = average-adjuster: see AVERAGE sb.2 4 b.
1702. 3rd Let. to Gentl. in Country, 21. The Stater of the Case makes me to affirm the Former.
1702. R. Crosfeild, Affections of People, 6. Those Gentlemen that were then the Publick Staters of Accounts.
1820. Lady Granville, Lett., 6 Sept., Lett. (1894), I. 179. It is of no use what is stated when people are resolved not to believe the staters.
1884. Times, 5 April, 5/5. Mr. Smith for many years carried on business at Glasgow as an average stater.