The Collaborative International Dictionary of English v.0.48:

True \True\ (tr[udd]), a. [Compar. Truer (tr[udd]"[~e]r);
   superl. Truest.] [OE. trewe, AS. tre['o]we faithful, true,
   from tre['o]w fidelity, faith, troth; akin to OFries. triuwe,
   adj., treuwa, n., OS. triuwi, adj., trewa, n., D. trouw, adj.
   & n., G. treu, adj., treue, n., OHG. gitriuwi, adj., triuwa,
   n., Icel. tryggr, adj., Dan. tro, adj. & n., Sw. trogen,
   adj., tro, n., Goth. triggws, adj., triggwa, n., trauan to
   trust, OPruss druwis faith. Cf. Trow, Trust, Truth.]
   [1913 Webster]
   1. Conformable to fact; in accordance with the actual state
      of things; correct; not false, erroneous, inaccurate, or
      the like; as, a true relation or narration; a true
      history; a declaration is true when it states the facts.
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   2. Right to precision; conformable to a rule or pattern;
      exact; accurate; as, a true copy; a true likeness of the
      original.
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            Making his eye, foot, and hand keep true time. --Sir
                                                  W. Scott.
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   3. Steady in adhering to friends, to promises, to a prince,
      or the like; unwavering; faithful; loyal; not false,
      fickle, or perfidious; as, a true friend; a wife true to
      her husband; an officer true to his charge.
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            Thy so true,
            So faithful, love unequaled.          --Milton.
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            Dare to be true: nothing can need a lie. --Herbert.
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   4. Actual; not counterfeit, adulterated, or pretended;
      genuine; pure; real; as, true balsam; true love of
      country; a true Christian.
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            The true light which lighteth every man that cometh
            into the world.                       --John i. 9.
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            True ease in writing comes from art, not chance.
                                                  --Pope.
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   5. (Biol.) Genuine; real; not deviating from the essential
      characters of a class; as, a lizard is a true reptile; a
      whale is a true, but not a typical, mammal.
      [Webster 1913 Suppl.]

   Note: True is sometimes used elliptically for It is true.
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   Out of true, varying from correct mechanical form,
      alignment, adjustment, etc.; -- said of a wall that is not
      perpendicular, of a wheel whose circumference is not in
      the same plane, and the like. [Colloq.]

   A true bill (Law), a bill of indictment which is returned
      by the grand jury so indorsed, signifying that the charges
      to be true.

   True time. See under Time.
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