Questions: Toward the end of the century, the term "director" came into common usage and the clearly defined role of the director was fully recognized.

The answer is 19th century.

Explanation: Toward the end of the 19th century, the term "director" came into common usage and the clearly defined role of the director was fully recognized. This period saw significant developments in the field of theater and the arts, with the emergence of the director as a distinct and essential role in the production process. Prior to this, the responsibilities now associated with a director were often divided among various members of the production team, such as the playwright, lead actor, or stage manager. The late 19th century marked a shift towards a more organized and professional approach to theater production, with the director taking on a central role in shaping the artistic vision and execution of a performance.