Entry 1 sense Webster, 1913 Anabaptistry · An·a·bap·tist·ry · IPA 01 n. The doctrine, system, or practice, of Anabaptists. 1. The doctrine, system, or practice, of Anabaptists.[R.] “Thus died this imaginary king; and Anabaptistry was suppressed in Munster.” — Pagitt.