Paragraph (noun)

1. A distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.
2. A mark or symbol used to indicate the beginning of a new paragraph.

Origin:

From ancient greek παράγραφος (parágraphos, “a writing beside”), from παρά (pará, “beside”) + γράφω (gráphō, “i write”).

Examples:

1. The essay should have at least three paragraphs.
2. I always indent the first line of each paragraph.
3. The paragraph symbol (¶) indicates a new paragraph.