Both Uses

soliloquy
in
Wuthering Heights
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'It's well the hellish villain has kept his word!' growled my future host, searching the darkness beyond me in expectation of discovering Heathcliff; and then he indulged in a soliloquy of execrations, and threats of what he would have done had the 'fiend' deceived him.†
p. 101.1 *
Catherine caught and perused it eagerly; then she put a few questions to me concerning the inmates, rational and irrational, of her former home; and gazing towards the hills, murmured in soliloquy: 'I should like to be riding Minny down there!†
p. 217.7

Definitions:

(1) (soliloquy)
a long speech in which one is talking to oneself; or as a long uninterrupted part of a conversation

In theatre, a soliloquy allows a character to voice their thoughts when they think they are alone, and in that way reveal their thoughts to the audience or other characters who overhear.
(2) (meaning too rare to warrant focus)