This article was written to sensitize Nigerian students, staff and faculty of tertiary institutions to the problem of plagiarism. The study emanated from the humanistic point of reasoning and used data from secondary source to: (i) explain the concept of plagiarism, (ii) discuss various forms of plagiarism, (iii) highlight the causes of plagiarism and (iv) explain the consequences of plagiarism. The study also indicates how to avoid plagiarism in academic presentations in order to ensure academic integrity in higher education systems in Nigeria.