Plagiarism is the act of presenting another person’s words, ideas, research, creative work, or original expression as one’s own without proper acknowledgement. It may involve direct copying, close paraphrasing, uncredited reuse of data, or the unauthorized use of images, designs, code, and other intellectual material.

Plagiarism is primarily an issue of attribution and academic, professional, or editorial integrity. It may occur intentionally or unintentionally, but both forms can damage credibility and may lead to disciplinary, reputational, or legal consequences.

What Is Plagiarism?

Plagiarism occurs when material created by another source is used without clearly identifying where it originated. The copied material does not need to be an entire article, report, or publication. A sentence, paragraph, statistic, argument, image, or distinctive idea may be plagiarized when it is presented without suitable credit.

Common forms of plagiarism include:

• Direct plagiarism: Copying text word for word without quotation marks or attribution.
• Paraphrasing plagiarism: Rewriting another source too closely while retaining its original structure or meaning without acknowledgement.
• Mosaic plagiarism: Combining copied phrases or ideas from several sources into new content without proper citation.
• Self-plagiarism: Reusing previously published work without disclosure when original material is expected.
• Source-based plagiarism: Misrepresenting, omitting, or inventing sources and citations.
• Accidental plagiarism: Failing to cite a source because of poor note-taking, misunderstanding, or oversight.

Plagiarism is not limited to written content. It may also involve photographs, illustrations, videos, music, software code, charts, research findings, presentations, and website content.

How Plagiarism Occurs

Plagiarism often occurs during research, writing, editing, or content production. Material may be copied directly from a source, lightly rewritten, or incorporated into a document without recording the original reference.

A passage may also become plagiarized when several words are replaced with synonyms but the sentence structure and central expression remain almost identical to the source. Proper paraphrasing requires the information to be explained independently while still crediting the original source when the idea is not common knowledge.

Plagiarism detection tools compare submitted text against webpages, academic papers, books, databases, and previously published documents. These tools identify textual similarities, but a similarity match does not automatically prove plagiarism. Quotations, references, technical phrases, and commonly used expressions may also produce matches. Human review is therefore necessary.

Example of Plagiarism

Original source:

Search engines use automated systems to discover, analyse, and organize webpages.

Plagiarized version:

Search engines use automated systems to discover, analyze, and organize web pages.

This version makes only minor spelling and formatting changes while retaining the original wording and structure.

Acceptable paraphrase:

Automated crawlers help search engines find webpages, examine their content, and add relevant information to searchable indexes.

The source should still be cited when the underlying explanation, finding, or idea was obtained from another publication.

Important Points and Best Practices

Original writing does not require every concept to be completely new. It requires sources to be used responsibly and distinctions to be maintained between original analysis and borrowed information.

Important practices include:

• Cite all non-original ideas, data, quotations, and research findings.
• Place exact copied wording inside quotation marks where appropriate.
• Paraphrase ideas using genuinely independent wording and sentence structure.
• Maintain accurate research notes and record source details during writing.
• Use primary and authoritative sources whenever possible.
• Obtain permission before using protected images, graphics, or other copyrighted material when required.
• Review similarity reports manually rather than relying only on a percentage score.
• Avoid copying material from competitors and making only minor wording changes.
• Disclose reused or republished material when editorial standards require it.
• Distinguish plagiarism from copyright infringement, although the two may sometimes overlap.

Plagiarism concerns ethical attribution, while copyright infringement concerns the unauthorized use of legally protected work. Content may be plagiarized without infringing copyright, and copyrighted material may be infringed even when the creator is credited.