pluperfect

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Of or being a verb tense used to express action completed before a specified or implied past time.
2. adj. More than perfect; supremely accomplished; ideal: "He has won a reputation as [a] pluperfect bureaucrat” ( New York Times).
3. n. The pluperfect tense, formed in English with the past participle of a verb and the auxiliary had, as had learned in the sentence He had learned to type by the end of the semester. Also called past perfect.
4. n. A verb or form in the pluperfect tense.

Century Dictionary and Cyclopedia

1. Noting the time, or the expression of time, of an action occurring prior to another specified time: as, the pluperfect tense.
2. n. In grammar, the pluperfect tense of a verb, or an equivalent verb-phrase: for example, Latin amaveram, English ‘I had loved.’
3. In music, augmented: said of intervals.

Wiktionary

1. adj. More than perfect
2. adj. grammar Pertaining to action completed before or at the same time as another
3. n. The pluperfect tense
4. n. A verb in this tense

GNU Webster's 1913

1. adj. 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.

WordNet 3.0

1. adj. more than perfect
2. n. a perfective tense used to express action completed in the past