Meaning of "the past perfect" in Essential American English Dictionary

the past perfect

noun us /ˌpæst ˈpɜr.fɪkt/

in grammar, the form of a verb that is used to show that an action was already finished when another action happened. The sentence “I had never been to Canada”is in the past perfect.

(Definition of “the past perfect” from the Webster's Essential Mini Dictionary © Cambridge University Press)