The Collaborative International Dictionary of English v.0.48:

Perfect \Per"fect\ (p[~e]r"f[e^]kt), a. [OE. parfit, OF. parfit,
   parfet, parfait, F. parfait, L. perfectus, p. p. of perficere
   to carry to the end, to perform, finish, perfect; per (see
   Per-) + facere to make, do. See Fact.]
   1. Brought to consummation or completeness; completed; not
      defective nor redundant; having all the properties or
      qualities requisite to its nature and kind; without flaw,
      fault, or blemish; without error; mature; whole; pure;
      sound; right; correct.
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            My strength is made perfect in weakness. --2 Cor.
                                                  xii. 9.
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            Three glorious suns, each one a perfect sun. --Shak.
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            I fear I am not in my perfect mind.   --Shak.
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            O most entire perfect sacrifice!      --Keble.
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            God made thee perfect, not immutable. --Milton.
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   2. Well informed; certain; sure.
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            I am perfect that the Pannonians are now in arms.
                                                  --Shak.
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   3. (Bot.) Hermaphrodite; having both stamens and pistils; --
      said of a flower.
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   Perfect cadence (Mus.), a complete and satisfactory close
      in the harmony, as upon the tonic preceded by the
      dominant.

   Perfect chord (Mus.), a concord or union of sounds which is
      perfectly coalescent and agreeable to the ear, as the
      unison, octave, fifth, and fourth; a perfect consonance; a
      common chord in its original position of keynote, third,
      fifth, and octave.

   Perfect number (Arith.), a number equal to the sum of all
      its divisors; as, 28, whose aliquot parts, or divisors,
      are 14, 7, 4, 2, 1. See Abundant number, under
      Abundant. --Brande & C.

   Perfect tense (Gram.), a tense which expresses an act or
      state completed; also called the perfective tense.
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   Syn: Finished; consummate; complete; entire; faultless;
        blameless; unblemished.
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WordNet (r) 3.0 (2006):

perfective tense
    n 1: a tense of verbs used in describing action that has been
         completed (sometimes regarded as perfective aspect) [syn:
         perfective, perfective tense, perfect, perfect
         tense]