C2 adjective /ˌpluːˈpɜːrfɪkt/
pluperfect
Plusquamperfekt
Meaning
a verb tense expressing an action completed before another past action
Example
By the time she arrived, he had finished his homework, showing the pluperfect tense.
Als sie ankam, hatte er seine Hausaufgaben bereits erledigt, was das Plusquamperfekt zeigt.