A paragraph (from Ancient Greek παράγραφος (parágraphos) 'to write beside') is a self-contained unit of discourse in writing dealing with a particular point or idea.
A paragraph is a section of text that pertains to a single theme and is designated by an indent or a line break. Paragraphs are at least one sentence long and are usually one part of a larger whole.
A paragraph is a component of fictional prose and non-fiction writings. When writing essays, research papers, books, etc., new paragraphs are indented to show their beginnings.