pluperfect tense

From Latin plus (“more”) +‎ perfectus (“perfect”).

pluperfect tense (plural pluperfect tenses)

1. (grammar, of a verb) Tense of a verb used when referring to something that happened before a past setting or the imperfect; formed in English by adding had before the past participle of a verb, or by adding had been before the present participle of the verb..

• past perfect progressive, past perfect, past perfect tense

• Wikipedia article on Pluperfect tenses