Merriam-Webster Collegiate Dictionary - pluperfect

 adjective  Etymology: Middle English pluperfyth, modification of Late Latin plusquamperfectus, literally, more than perfect  Date: 15th century  1. past perfect  2. utterly perfect or complete  • ~ noun PLURAL  adjective  Etymology: Middle English, from Anglo-French & Latin; Anglo-French plurel, from Latin ~is, from plur-, plus more — more at plus  Date: 14th century  1. of, relating to, or constituting a class of grammatical forms usually used to denote more than one or in some languages more than two  2. relating to, consisting of, or containing more than one or more than one kind or class a ~ society  • ~ noun  • ~ly adverb