to tell a story-possibly as the main voice in a documentary; or a character who speaks to the audience in a performance
The specific meaning of narrate depends on context. For example:
"She narrated her story with tears in her eyes." — told a story
"Her diary chillingly narrates her descent into madness." — tells a story in writing
"Morgan Freeman narrated the documentary which features historic news reports and interviews." — was the voice that tells a story while tying the scenes of a documentary together
"The character who plays the Stage Director in Our Town also narrates for the audience." — when an actor in a play, movie, or other performance helps to tell the story by talking directly to the audience (breaking the imaginary barrier between the performers and the audience)
Gerald knew that northward beyond that stream the land was still held by the Cherokees, so it was with amazement that he heard the stranger jeer at suggestions of trouble with the Indians and narrate how thriving towns were growing up and plantations prospering in the new country.
1.3 (33% in)
There are no more uses of "narrate" in Gone with the Wind.