Plagiarism is the presentation of another person's idea or product as one's own.  This includes things such as the following:

• Copying verbatim all or part of another's written work,
• Using phrases, charts, figures, illustrations, or mathematical or scientific solutions without citing the original source,
• Paraphrasing ideas, conclusions, or research without citing the source,
• Using all or part of a literary plot, poem, film, musical score, or other artistic product without attributing the work to its creator.

The examples provided above are some examples of plagiarism, but the list is not exhaustive.  If you make a conscientious effort to avoid using another person's work, and give attribution when you use someone else's work, then you are practicing academic integrity.

Remember, ignorance is not considered an excuse for plagiarism.  You are expected to know what plagiarism is.