Plagiarism is presenting or submitting someone else's work (words or ideas),
intentionally or unintentionally, as your own. This is considered to be a form
of cheating and may be subject to disciplinary action.

There are various forms of plagiarism including:

• Copying: using the same, or very similar, words to the original text
  (whether in a book, journal, website or any other source) without
  either acknowledging the source or using quotation marks. This also
  applies to images, pictures and melodies.
• Paraphrasing: changing a few words and phrases from the original
  but retaining too much of the original structure and expressions
• Collusion: working with others but passing off the work as your own
  individual work
• Duplication: submitting work for one module which had been
  prepared for another