noun / verb
monologue
MAH-nuh-lawg/ˈmɑːnəlɔːɡ/
A long speech by one person without conversational exchange.
The actor delivers a dramatic monologue while the seated audience listens.

Etymology
The pieces describe speaking alone: a dramatic scene in which one person speaks alone. The word also names a long speech delivered by a single speaker.
In context
… deliver a long rambling monologue full of unnecessary verbal flourishes and lengthy ruminations on the nature of choice …
More examples
- He monologues about his favorite movies while everyone else listens.
- The actor rehearses her monologue before the audition.
- I ask one question and get a twenty-minute monologue.
Forms
monologue · monologues · monologued · monologuing
monologist noun — A person who performs or delivers monologues.