Webster's Revised Unabridged Dictionary · 1913

Palatial

Palatial , adjective

[Latin palatium palace. See Palace.]

Of or pertaining to a palace; suitable for a palace; resembling a palace; royal; magnificent; as, palatial structures.
Palatial style. — A. Drummond

Palatial , adjective

[From Palate.]

(Anatomy) Palatal; palatine. [Obsolete] — Barrow

Palatial , noun

A palatal letter. [Obsolete] — Sir W. Jones