The title of Tennessee Williams' play "A Streetcar Named Desire" has great significance and is a metaphor for the central themes and conflicts of the play.

The streetcar named Desire is the one that brings Blanche DuBois to New Orleans to stay with her sister Stella and her husband Stanley. The streetcar is a symbol of Blanche's journey, her desires, and her struggles. It is also symbolic of the social changes happening in the country at the time, as streetcars were being replaced by buses and cars.

The title also highlights the themes of desire and longing that run throughout the play. Blanche is driven by her desire to escape her past and create a new life for herself. Stanley is driven by his desire for power and control over his wife and his environment. Stella is torn between her love for her sister and her loyalty to her husband.

The title can also be seen as a commentary on the idea of the American Dream, as Blanche's desire to start a new life represents the pursuit of happiness and fulfillment that is at the core of the American Dream.

Overall, the title "A Streetcar Named Desire" is a powerful metaphor for the themes and conflicts of the play, and it captures the complex desires and struggles of the characters as they navigate their way through the shifting social and cultural landscape of mid-century America.