This is a long, uninterrupted speech by a character in a play, story, or poem.

So we have a monologue and a soliloquy.

Monologue - Long speech by a single character revealing private thoughts and feelings

Soliloquy - a character relates thoughts / feelings to him/herself and the audience often when alone.

The difference between the two is that a soliloquy is personal, the other characters cannot hear it.

I want to say that a long, uninterrupted speech by a character in a play, story, or poem or a monologue.