Meriam-Wester online dictionary define PLAGIARISM as
Self-plagiarism:
is the act of copying your own work after it has been published or unpublished to be resubmitted for another evaluation without permission?
How does Scribbr detect plagiarism?
Scribbr uses advanced algorithms and tools to detect plagiarism better than any other plagiarism software.
Access to exclusive content databases:
Each submission is compared to the world's largest content database, which contains 99 billion web sites, 8 million publications and information in over 20 languages.
Comparison against unpublished works:
To catch self-plagiarism, upload previous assignments, referenced works, or a classmate's paper or essay. this, will easily detect similarities between the work that is being submitted and the previous works unploaded
Scribbr is powered by Turnitin, a leader in plagiarism detection. Turnitin has approved Scribbr as a partner. Its software detects everything from exact word matches to synonym swapping and can generate a detailed plagiarism report for every document it examines.
GUIDES & TUTORIALS
Frequently A&Q for students (FAQs):
https://www.turnitin.com/help_pages/student_faq.asp?r=87.6295589277586