(historical) A costly cloth, probably a kind of silk.

(Greek mythology, Roman mythology) A dark and gloomy part of the realm of Hades, reserved for the damned and the wicked, such as the Titans; an equivalent of hell in Greek and Roman mythology.

Of or relating to Tartarus.

A native or inhabitant of Tartary. / A native or inhabitant of Tartarus.

(chemistry, obsolete) Potassium carbonate, obtained by the incineration of tartar.

(archaic) The Eurasian Steppe. / Obsolete form of Tartarus.

plural of Tartarian

(now rare) A Tartar. / (now rare) The language of the Tartars; Tatar.

Of or relating to Tartary or the Tartars; Tartaric.

Pertaining to Tartarus; hellish, infernal.