Originality is the aspect of created or invented works as being new or novel, and thus distinguishable from reproductions, clones, forgeries, or derivative works. An original work is one not received from others nor one copied from or based upon the work of others.. It is a work created with a unique style and substance. The term "originality" is often applied as a compliment to the creativity of artists, writers, and thinkers. The modern idea of originality is tied to Romanticism, by a notion that is often called romantic originality. - Wikipedia
Plagiarism is the representation of another author's language, thoughts, ideas, or expressions as one's own original work. - Wikipedia
Synonyms of plagiarism include to copy and paste, to pass off as one's own, infringe the copyright of, and steal.