Plagiarism is the practice of taking someone else's work or ideas and passing them off as one's own
From The Oxford Dictionary
Plagiarism can be both intentional and unintentional.
Intentional plagiarism can include:
Unintentional, or accidental, plagiarism occurs when using the words or ideas of others and failing to quote or give credit, perhaps because of a lack of knowledge about proper citation.
This can include: