To plagiarize means to copy someone else's words, ideas, or creative work and present them as your own. When a student plagiarizes a book report, they might copy paragraphs from a website without saying where they came from. When someone plagiarizes, they're essentially stealing credit for work they didn't do.

Plagiarism can happen in many forms. You might plagiarize by copying sentences word-for-word, by paraphrasing someone's ideas without giving credit, or even by turning in a paper your older sibling wrote years ago.

Schools take plagiarism seriously because learning requires doing your own thinking. If you copy someone else's essay, you miss the chance to develop your own writing skills and understanding. Professional writers and researchers can lose their jobs and reputations for plagiarizing.

The opposite of plagiarizing is citing your sources, which means clearly stating where you found information. When you write “According to NASA's website...” or include a bibliography, you're showing respect for other people's work while still using it to support your own ideas. That's both honest and effective because it makes your work stronger by showing you've done real research.