I am the narrator. A generic voice that doesn't actually exist, but moves the plot along for your convenience. Don't I sound irresistibly sexy?—Smashtasm, Season 2 Episode 1.
A character, sometimes part of the story proper and sometimes completely external to it, who acts either as the storyteller or as a framing device. A Narrator always breaks the Fourth Wall, explicitly addressing the audience to tell them the story. Sometimes the Narrator is also responsible for presenting An Aesop to the audience at the end of the story, as in The Twilight Zone and its imitators.