The Collaborative International Dictionary of English v.0.48:

Turn \Turn\ (t[^u]rn), v. i.
   1. To move round; to have a circular motion; to revolve
      entirely, repeatedly, or partially; to change position, so
      as to face differently; to whirl or wheel round; as, a
      wheel turns on its axis; a spindle turns on a pivot; a man
      turns on his heel.
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            The gate . . . on golden hinges turning. --Milton.
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   2. Hence, to revolve as if upon a point of support; to hinge;
      to depend; as, the decision turns on a single fact.
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            Conditions of peace certainly turn upon events of
            war.                                  --Swift.
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   3. To result or terminate; to come about; to eventuate; to
      issue.
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            If we repent seriously, submit contentedly, and
            serve him faithfully, afflictions shall turn to our
            advantage.                            --Wake.
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   4. To be deflected; to take a different direction or
      tendency; to be directed otherwise; to be differently
      applied; to be transferred; as, to turn from the road.
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            Turn from thy fierce wrath.           --Ex. xxxii.
                                                  12.
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            Turn ye, turn ye from your evil ways. --Ezek.
                                                  xxxiii. 11.
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            The understanding turns inward on itself, and
            reflects on its own operations.       --Locke.
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   5. To be changed, altered, or transformed; to become
      transmuted; also, to become by a change or changes; to
      grow; as, wood turns to stone; water turns to ice; one
      color turns to another; to turn Muslim.
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            I hope you have no intent to turn husband. --Shak.
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            Cygnets from gray turn white.         --Bacon.
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   6. To undergo the process of turning on a lathe; as, ivory
      turns well.
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   7. Specifically:
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      (a) To become acid; to sour; -- said of milk, ale, etc.
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      (b) To become giddy; -- said of the head or brain.
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                I'll look no more;
                Lest my brain turn.               --Shak.
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      (c) To be nauseated; -- said of the stomach.
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      (d) To become inclined in the other direction; -- said of
          scales.
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      (e) To change from ebb to flow, or from flow to ebb; --
          said of the tide.
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      (f) (Obstetrics) To bring down the feet of a child in the
          womb, in order to facilitate delivery.
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   8. (Print.) To invert a type of the same thickness, as
      temporary substitute for any sort which is exhausted.
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   To turn about, to face to another quarter; to turn around.


   To turn again, to come back after going; to return. --Shak.

   To turn against, to become unfriendly or hostile to.

   To turn aside or To turn away.
      (a) To turn from the direct course; to withdraw from a
          company; to deviate.
      (b) To depart; to remove.
      (c) To avert one's face.

   To turn back, to turn so as to go in an opposite direction;
      to retrace one's steps.

   To turn in.
      (a) To bend inward.
      (b) To enter for lodgings or entertainment.
      (c) To go to bed. [Colloq.]

   To turn into, to enter by making a turn; as, to turn into a
      side street.

   To turn off, to be diverted; to deviate from a course; as,
      the road turns off to the left.

   To turn on or To turn upon.
      (a) To turn against; to confront in hostility or anger.
      (b) To reply to or retort.
      (c) To depend on; as, the result turns on one condition.


   To turn out.
      (a) To move from its place, as a bone.
      (b) To bend or point outward; as, his toes turn out.
      (c) To rise from bed. [Colloq.]
      (d) To come abroad; to appear; as, not many turned out to
          the fire.
      (e) To prove in the result; to issue; to result; as, the
          crops turned out poorly.

   To turn over, to turn from side to side; to roll; to
      tumble.

   To turn round.
      (a) To change position so as to face in another direction.
      (b) To change one's opinion; to change from one view or
          party to another.

   To turn to, to apply one's self to; to have recourse to; to
      refer to. "Helvicus's tables may be turned to on all
      occasions." --Locke.

   To turn to account, profit, advantage, or the like, to
      be made profitable or advantageous; to become worth the
      while.

   To turn under, to bend, or be folded, downward or under.

   To turn up.
      (a) To bend, or be doubled, upward.
      (b) To appear; to come to light; to transpire; to occur;
          to happen.
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The Collaborative International Dictionary of English v.0.48:

Advantage \Ad*van"tage\ (?; 61, 48), n. [OE. avantage,
   avauntage, F. avantage, fr. avant before. See Advance, and
   cf. Vantage.]
   1. Any condition, circumstance, opportunity, or means,
      particularly favorable to success, or to any desired end;
      benefit; as, the enemy had the advantage of a more
      elevated position.
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            Give me advantage of some brief discourse. --Shak.
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            The advantages of a close alliance.   --Macaulay.
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   2. Superiority; mastery; -- with of or over.
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            Lest Satan should get an advantage of us. --2 Cor.
                                                  ii. 11.
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   3. Superiority of state, or that which gives it; benefit;
      gain; profit; as, the advantage of a good constitution.
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   4. Interest of money; increase; overplus (as the thirteenth
      in the baker's dozen). [Obs.]
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            And with advantage means to pay thy love. --Shak.
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   5. (Tennis) The first point scored after deuce.
      [PJC]

   Advantage ground, vantage ground. [R.] --Clarendon.

   To have the advantage of (any one), to have a personal
      knowledge of one who does not have a reciprocal knowledge.
      "You have the advantage of me; I don't remember ever to
      have had the honor." --Sheridan.

   To take advantage of, to profit by; (often used in a bad
      sense) to overreach, to outwit.
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   Syn: Advantage, Advantageous, Benefit, Beneficial.

   Usage: We speak of a thing as a benefit, or as beneficial,
          when it is simply productive of good; as, the benefits
          of early discipline; the beneficial effects of
          adversity. We speak of a thing as an advantage, or as
          advantageous, when it affords us the means of getting
          forward, and places us on a "vantage ground" for
          further effort. Hence, there is a difference between
          the benefits and the advantages of early education;
          between a beneficial and an advantageous investment of
          money.
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The Collaborative International Dictionary of English v.0.48:

Advantage \Ad*van"tage\, v. t. [imp. & p. p. Advantaged; p.
   pr. & vb. n. Advantaging.] [F. avantager, fr. avantage. See
   Advance.]
   To give an advantage to; to further; to promote; to benefit;
   to profit.
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         The truth is, the archbishop's own stiffness and
         averseness to comply with the court designs, advantaged
         his adversaries against him.             --Fuller.
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         What is a man advantaged, if he gain the whole world,
         and lose himself, or be cast away?       --Luke ix. 25.
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   To advantage one's self of, to avail one's self of. [Obs.]
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WordNet (r) 3.0 (2006):

advantage
    n 1: the quality of having a superior or more favorable
         position; "the experience gave him the advantage over me"
         [syn: advantage, vantage] [ant: disadvantage]
    2: (tennis) first point scored after deuce
    3: benefit resulting from some event or action; "it turned out
       to my advantage"; "reaping the rewards of generosity" [syn:
       advantage, reward] [ant: penalty]
    v 1: give an advantage to; "This system advantages the rich"
         [ant: disadvantage, disfavor, disfavour]