Official glossary page from ISTQB® will allow you to find the definitions for software quality and testing terms used in the ISTQB® certification products. Visit the page via button on the right or use the embedded version below.  

Download the PDF version containing an export of all ISTQB terms, giving you convenient access to the complete terminology in one place and allowing you to easily review, search, reference, and work with the terms even when you are offline.