noun. a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage.
1. Noun, singular or mass Compare it to the one in your photo or copy and paste the original checksum from the HBCD PE site and let Checksum Calculator compare them. 2. Adjective If your data fails a checksum verification, it usually means that you need to replace it from a backup or otherwise reconstruct the affected file.