“Paragraph: (Greek “side writing): Originally a short, horizontal stroke drawn below the beginning of a line in which there was a break in the sense. Now, for all practical purposes, a passage, or section, of subdivision in a piece of writing, Usually a paragraph deals with one particular point of aspect of the subject presented. It may vary greatly in length.”
Excerpted from: Cuddon, J.A. The Penguin Dictionary of Literary Terms and Literary Theory. New York: Penguin, 1992.