C2 adjective /ˌpluːˈpɜːrfɪkt/
pluperfect
plus-que-parfait
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.
Quand elle est arrivée, il avait déjà terminé ses devoirs, montrant le plus-que-parfait.