Thomas Corneille (born Aug. 20, 1625, Rouen, Fr.—died Dec. 8, 1709, Les Andelys) was a French dramatist, younger brother of the great French Classical playwright Pierre Corneille. He was a highly successful dramatic poet in his own right, whose works helped to confirm the character of the French Classical theatre.
Between 1656 and 1678 Corneille put on no fewer than 16 tragedies, starting with Timocrate (1656), which was among the dramatic successes of the century. His best play is the tragedy Ariane (1672; The Labyrinth, 1795). He also experimented with comedy in the then-popular Spanish style (Le Geôlier de soi-même, 1655), with opera, and with lyric drama.
Corneille had a sense of timing and a flair for ingenious dramatic effects. One original contribution to the drama was the extended use in his later works of stage machinery in an attempt to enlarge the range of tragedy. Elected to the Académie Française in 1685, he helped to compile an encyclopaedic dictionary.