The article therefore focuses on the issue of plagiarism in English academic writing, discussing various classifications of plagiarism and proposing a synthesis which includes the forms of plagiarism committed in English academic writing. | Trường Đại học Vinh Tạp chí khoa học, Tập 46, Số 2B (2017), tr. 5-20 PLAGIARISM IN ENGLISH ACADEMIC WRITING: BUILDING DEFINITIONS AND CLARIFYING TYPES Nguyen Thi Van Lam (1), Filipi Anna (2) Faculty of Education, Monash University, Melbourne, Victoria, Australia; Department of Foreign Languages, Vinh University, Vinh City, Nghe An, Vietnam 2 Faculty of Education, Monash University, Melbourne, Victoria, Australia Received on 01/8/2017, accepted for publication on 21/10/2017 1 Abstract: Plagiarism is a matter of serious concern in education worldwide in general and in Vietnam in particular. This problematic issue has not been carefully taught at any level of education in Vietnam. The article therefore focuses on the issue of plagiarism in English academic writing, discussing various classifications of plagiarism and proposing a synthesis which includes the forms of plagiarism committed in English academic writing. It is hoped that this synthesis will help educators and students better understand and identify types of plagiarism, raising awareness of the ways in which plagiarism can be avoided and thus improving the quality of academic writing in English. 1. Introduction Plagiarism, ‘the practice of taking someone else’s work or ideas and passing them off as one’s own’ [33], has drawn the attention of numerous researchers and educators worldwide. A plethora of research pertains to diverse focuses such as teachers’ and students’ perceptions of plagiarism [2], plagiarism and the Internet [43], plagiarism and academic writing [37], plagiarism and its connection to skills as critical thinking [22], plagiarism and paraphrasing [5], and plagiarism detection software [7]. The findings demonstrate the increasing prevalence of plagiarism in many parts of the world, and continuous efforts to apply various pedagogical strategies to militate against that prevalence. When we turn our attention to higher education in Vietnam, plagiarism has also been widely reported in the .