soliloquy
US /səˈlɪl.ə.kwi/
UK /səˈlɪl.ə.kwi/

1.
soliloquio, monólogo
an act of speaking one's thoughts aloud when by oneself or regardless of any hearers, especially by a character in a play
:
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Hamlet's famous 'To be or not to be' is a classic example of a soliloquy.
El famoso 'Ser o no ser' de Hamlet es un ejemplo clásico de soliloquio.
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The actor delivered a powerful soliloquy that captivated the audience.
El actor pronunció un poderoso soliloquio que cautivó a la audiencia.