What is the difference between monologue and dialogue? a monologue is a conversation between at least two people; a dialogue is a long speech given by a single individual. a monologue is a speech given by a single individual; a dialogue is a conversation between at least two people. a monologue is a conversation between three characters; a dialogue is information shared only with the audience, not other characters. a monologue is a conversation between three characters; a dialogue is the innermost thoughts of the character shared in a speech given by a single individual.