What is Plagiarism?

Based on definition by Merriam-Webster online dictionary, plagiarize means to steal and pass off (the ideas or words of another) as one's own or use (another's production) without crediting the source. Another definition by mentioned that plagiarism is an act or instance of 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.

In other words plagiarism is an act of deception or fraud that committed by anyone who used in their works without consent or crediting the ideas, word, thoughts, languages or productions to the original author or creator. It is presumed that this act is illegal and infringe the idea of originality based on intellectual property standard.

Forms of Plagiarism
Preventing Plagiarism when Writing
Why the Need of Detection?

According to Wikipedia :

"Plagiarism detection is the process of locating instances of plagiarism within a work or document. The widespread use of computers and the advent of the Internet has made it easier to plagiarize the work of others. Most cases of plagiarism are found in academia, where documents are typically essays or reports. However, plagiarism can be found in virtually any field, including novels, scientific papers, art designs, and source code. Detection of plagiarism can be either manual or software-assisted. Manual detection requires substantial effort and excellent memory, and is impractical in cases where too many documents must be compared, or original documents are not available for comparison. Software-assisted detection allows vast collections of documents to be compared to each other, making successful detection much more likely".