Separatist \Sep`a*ra*tist\, n. [Cf. F. s['e]paratiste.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)