Plu"per`fect (?), a. [L. plus more + perfectus perfect; cf. F. plus-que-parfait, L. plusquamperfectum.]
More than perfect; past perfect; -- said of the tense which denotes that an action or event was completed at or before the time of another past action or event.
The pluperfect tense; also, a verb in the pluperfect tense.
© Webster 1913.