D defs.my
Entry 1 sense Webster, 1913

Separatist

/sĕp'-ẽr-ət-ĭst/ · Sep·a·ra·tist · IPA /ˈsɛpəɹətɪst/
01 n. One who withdraws or separates himself; especially, one who withdraws from a church to which he has belonged; a seceder from an established…
  1. 1.
    One who withdraws or separates himself; especially, one who withdraws from a church to which he has belonged; a seceder from an established church; a dissenter; a nonconformist; a schismatic; a sectary.
    “Heavy fines on divines who should preach in any meeting of separatist .” Macaulay.