to lose sight of

from The Collaborative International Dictionary of English v.0.48
Lose \Lose\ (l[=oo]z), v. t. [imp. & p. p. {Lost} (l[o^]st; 115)
   p. pr. & vb. n. {Losing} (l[=oo]z"[i^]ng).] [OE. losien to
   loose, be lost, lose, AS. losian to become loose; akin to OE.
   leosen to lose, p. p. loren, lorn, AS. le['i]san, p. p. loren
   (in comp.), D. verliezen, G. verlieren, Dan. forlise, Sw.
   f["o]rlisa, f["o]rlora, Goth. fraliusan, also to E. loose, a
   & v., L. luere to loose, Gr. ly`ein, Skr. l[=u] to cut.
   [root]127. Cf. {Analysis}, {Palsy}, {Solve}, {Forlorn},
   {Leasing}, {Loose}, {Loss}.]
   [1913 Webster]
   1. To part with unintentionally or unwillingly, as by
      accident, misfortune, negligence, penalty, forfeit, etc.;
      to be deprived of; as, to lose money from one's purse or
      pocket, or in business or gaming; to lose an arm or a leg
      by amputation; to lose men in battle.
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            Fair Venus wept the sad disaster
            Of having lost her favorite dove.     --Prior.
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   2. To cease to have; to possess no longer; to suffer
      diminution of; as, to lose one's relish for anything; to
      lose one's health.
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            If the salt hath lost his savor, wherewith shall it
            be salted?                            --Matt. v. 13.
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   3. Not to employ; to employ ineffectually; to throw away; to
      waste; to squander; as, to lose a day; to lose the
      benefits of instruction.
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            The unhappy have but hours, and these they lose.
                                                  --Dryden.
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   4. To wander from; to miss, so as not to be able to and; to
      go astray from; as, to lose one's way.
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            He hath lost his fellows.             --Shak
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   5. To ruin; to destroy; as destroy; as, the ship was lost on
      the ledge.
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            The woman that deliberates is lost.   --Addison.
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   6. To be deprived of the view of; to cease to see or know the
      whereabouts of; as, he lost his companion in the crowd.
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            Like following life thro' creatures you dissect,
            You lose it in the moment you detect. --Pope.
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   7. To fail to obtain or enjoy; to fail to gain or win; hence,
      to fail to catch with the mind or senses; to miss; as, I
      lost a part of what he said.
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            He shall in no wise lose his reward.  --Matt. x. 42.
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            I fought the battle bravely which I lost,
            And lost it but to Macedonians.       --Dryden.
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   8. To cause to part with; to deprive of. [R.]
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            How should you go about to lose him a wife he loves
            with so much passion?                 --Sir W.
                                                  Temple.
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   9. To prevent from gaining or obtaining.
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            O false heart! thou hadst almost betrayed me to
            eternal flames, and lost me this glory. --Baxter.
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   {To lose ground}, to fall behind; to suffer gradual loss or
      disadvantage.

   {To lose heart}, to lose courage; to become timid. "The
      mutineers lost heart." --Macaulay.

   {To lose one's head}, to be thrown off one's balance; to lose
      the use of one's good sense or judgment, through fear,
      anger, or other emotion.
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            In the excitement of such a discovery, many scholars
            lost their heads.                     --Whitney.

   {To lose one's self}.
      (a) To forget or mistake the bearing of surrounding
          objects; as, to lose one's self in a great city.
      (b) To have the perceptive and rational power temporarily
          suspended; as, we lose ourselves in sleep.

   {To lose sight of}.
      (a) To cease to see; as, to lose sight of the land.
      (b) To overlook; to forget; to fail to perceive; as, he
          lost sight of the issue.
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