/
səˈlɪləkwi/
n.
 (pl. soliloquies)
 an act of speaking one's thoughts aloud when alone or regardless of hearers, especially by a character in a play.
Derivative
- soliloquist n.
- soliloquize
 or soliloquise v.
Etymology
ME: from late L. soliloquium, from L. solus ‘alone’ + loqui ‘speak’.