c.1600, of persons; in reference to places, 1798, past participle adjective from seclude (v.). Earlier secluse (1590s).
mid-15c., "to shut up, enclose, confine," from Latin secludere "shut off, confine," from se- "apart" (see secret) + -cludere, variant of claudere "to shut" (see close (v.)). Meaning "to remove or guard from public view" is recorded from 1620s. Related: Secluded; secluding.