tith·er I. \ˈtīthə(r)\noun (-s) Etymology: Middle English, from tithen to tithe + -er 1.: one that pays tithes < practically every member of the church is a tither — Emporia (Kans.) Gazette > 2.: one that collects or advocates the payment of tithes II. \ˈtithə(r)\ variant of tother