There are different types of plagiarism and all are serious violations of academic honesty.
Direct plagiarism: the word-for-word transcription of part of someone else’s work, without attribution and without quotation marks.
Self-plagiarism occurs when a student submits his or her own previous work, or mixes parts of previous works.
Mosaic Plagiarism occurs when a student borrows phrases from a source without using quotation marks, or finds synonyms for the author’s language while keeping to the same general structure and meaning of the original.
Accidental plagiarism occurs when a person neglects to cite their sources or unintentionally paraphrases a source by using similar words, groups of words without attribution. Cases of accidental plagiarism are taken as seriously as any other plagiarism.