Meaning of PAST PERFECT in English

PAST PERFECT

adjective Date: 1889 of, relating to, or constituting a verb tense that is traditionally formed in English with had and denotes an action or state as completed at or before a past time spoken of, ~ noun

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.