Repetition of a pattern of words within a sentence or passage.
Example From Text
But, in a larger sense, we can not dedicate—we can not consecrate—we can not hallow—this ground.
Lincoln uses parallel structure with the repetition of the words "we can not," in order to emphasize his point and make his meaning clear. Try reading the sentence out loud to hear the rhythm of the language. Do you find your attention drawn to the words "dedicate," "consecrate," and "hallow"?