Plagiarism takes many forms, but the most common on college campuses include:
http://haywood.libguides.com/plagiarism
Plagiarism
Using or closely imitating the language and thoughts of another author without authorization and the representation of that author's work as one's own, as by not crediting the original author.
dictionary.com
http://www.teachertube.com/video/ethics-cheating-and-plagiarism-264679