Plagiarism what does it mean

 Plagiarism Illustration, the left picture showing copying without credit, the right picture show copying with proper credit.

Based on a paper titled "Plagiarism - A Survey" written by Maurer, Kappe, and Zaka (2006), plagiarism can be viewed from the perspective of "theft of intellectual property." As mentioned in that paper, Plagiarism.org (2006) defines plagiarism as:

1. turning in someone else's work as your own 
2. copying words or ideas from someone else without giving credit 
3. failing to put a quotation in quotation marks 
4. giving incorrect information about the source of a quotation 
5. changing words but copying the sentence structure of a source without giving credit 
6. copying so many words or ideas from a source that it makes up the majority of your work, whether you give credit or not

Based on that definition, claiming someone else's work as your own should be defined as plagiarism. Copying words from someone else without giving proper credit should also be considered plagiarism. Quoting without using proper quotation marks, paraphrasing while copying the structure without attribution, providing false information about the source of a quotation, and copying large portions of text that make up the majority of your work—even if credit is given—should also be classified as plagiarism.

References:

Maurer, H. A., Kappe, F., & Zaka, B. (2006). Plagiarism-A survey. J. Univers. Comput. Sci., 12(8), 1050-1084.

Plagiarism.org. (2006). Research resources at plagiarism.org. Retrieved July 22, 2006, from http://www.plagiarism.org/research_site/e_what_is_plagiarism.html