Final answer:
The nine-letter term for a play that has withstood the test of time is 'classic,' as it denotes a work that remains popular, relevant, and respected across generations.
Step-by-step explanation:
The play described as having withstood the test of time and has a length of nine letters is best defined as a classic. A play considered classic is one that remains popular and relevant over the years, transcending contemporary trends and continuing to resonate with audiences across different generations.
While contemporary plays focus on the accurate replication of current life and realness, it is the classic play that maintains a lasting presence in theatre due to its universal themes, expert craftsmanship, and its ability to be revisited and reinterpreted by new audiences and theatre companies.