Soliloquy (noun)

1. A monologue spoken by a character in a play or other work of literature who is alone or believes themselves to be alone.
2. A long speech by one person, especially one that is not addressed to others.

Origin:

From latin solus ("alone") + loqui ("to spea.k")

Examples:

1. In Act 2, Scene 2 of Hamlet, Hamlet delivers his famous "To be or not to be" soliloquy.
2. The soliloquy in which the character reveals his innermost thoughts and feelings.
3. He practiced his soliloquy for hours before the play.
4. The soliloquy was a powerful tool for the actor to express the character's inner turmoil.
5. In the soliloquy, the character is able to speak his mind freely.