n. 1. Talking to oneself; speaking one’s thoughts aloud without addressing anyone.
2. A literary device, especially in theater, in which a character reveals his or her thoughts in this way.
“It is notorious that we speak no more than half-truths in our ordinary conversation, and even a soliloquy is likely to be affected by the apprehension that walls have ears.”
-Eric Robert Linklater
From Latin solus ‘alone’ + loqui ‘speak’. “To be or not to be…” begins one famous soliloquy. The word ‘monologue’ has a similar meaning, except that a monologue may be addressed to others, while a soliloquy is a speech to oneself.
“To soliloquize or not to soliloquize, that is the question…”