Of or relating to Thespis, a semi-legendary Greek poet of Icaria in Attica, often called the father of tragedy; relating or pertaining to dramatic acting in general; dramatic; tragic: as, the Thespian art, the drama.
noun.
An actor.
the GNU version of the Collaborative International Dictionary of English
adjective.
Of or pertaining to Thespis; hence, relating to the drama; dramatic.