What term refers to a long speech given by a single performer or speaker in a group?

The term "monologue" designates a long speech delivered by a single individual, often within the context of a performance, play, or narrative. In a monologue, the performer expresses thoughts, emotions, or a narrative directly to an audience or other characters, providing insight into their character's motivations or perspective. This term is commonly used in theater, literature, and public speaking.

In contrast, a dialogue involves a conversation between two or more characters or participants, which distinguishes it significantly from a monologue. Similarly, a soliloquy, while also a speech from a single character, is typically delivered when the character is alone on stage to convey their inner thoughts, making it more introspective. An interjection, on the other hand, is a brief expression or remark often used to convey emotion or sentiment and does not constitute a lengthy speech. Thus, the definition of "monologue" aligns perfectly with the requirement of a long speech given by a single performer.