The Collaborative International Dictionary of English v.0.48:

Single \Sin"gle\, a. [L. singulus, a dim. from the root in
   simplex simple; cf. OE. & OF. sengle, fr. L. singulus. See
   Simple, and cf. Singular.]
   1. One only, as distinguished from more than one; consisting
      of one alone; individual; separate; as, a single star.
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            No single man is born with a right of controlling
            the opinions of all the rest.         --Pope.
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   2. Alone; having no companion.
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            Who single hast maintained,
            Against revolted multitudes, the cause
            Of truth.                             --Milton.
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   3. Hence, unmarried; as, a single man or woman.
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            Grows, lives, and dies in single blessedness.
                                                  --Shak.
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            Single chose to live, and shunned to wed. --Dryden.
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   4. Not doubled, twisted together, or combined with others;
      as, a single thread; a single strand of a rope.
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   5. Performed by one person, or one on each side; as, a single
      combat.
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            These shifts refuted, answer thy appellant, . . .
            Who now defles thee thrice ti single fight.
                                                  --Milton.
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   6. Uncompounded; pure; unmixed.
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            Simple ideas are opposed to complex, and single to
            compound.                             --I. Watts.
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   7. Not deceitful or artful; honest; sincere.
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            I speak it with a single heart.       --Shak.
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   8. Simple; not wise; weak; silly. [Obs.]
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            He utters such single matter in so infantly a voice.
                                                  --Beau. & Fl.
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   Single ale, Single beer, or Single drink, small ale,
      etc., as contrasted with double ale, etc., which is
      stronger. [Obs.] --Nares.

   Single bill (Law), a written engagement, generally under
      seal, for the payment of money, without a penalty.
      --Burril.

   Single court (Lawn Tennis), a court laid out for only two
      players.

   Single-cut file. See the Note under 4th File.

   Single entry. See under Bookkeeping.

   Single file. See under 1st File.

   Single flower (Bot.), a flower with but one set of petals,
      as a wild rose.

   Single knot. See Illust. under Knot.

   Single whip (Naut.), a single rope running through a fixed
      block.
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The Collaborative International Dictionary of English v.0.48:

Entry \En"try\, n.; pl. Entries. [OE. entree, entre, F.
   entr['e]e, fr. entrer to enter. See Enter, and cf.
   Entr['e]e.]
   1. The act of entering or passing into or upon; entrance;
      ingress; hence, beginnings or first attempts; as, the
      entry of a person into a house or city; the entry of a
      river into the sea; the entry of air into the blood; an
      entry upon an undertaking.
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   2. The act of making or entering a record; a setting down in
      writing the particulars, as of a transaction; as, an entry
      of a sale; also, that which is entered; an item.
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            A notary made an entry of this act.   --Bacon.
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   3. That by which entrance is made; a passage leading into a
      house or other building, or to a room; a vestibule; an
      adit, as of a mine.
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            A straight, long entry to the temple led. --Dryden.
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   4. (Com.) The exhibition or depositing of a ship's papers at
      the customhouse, to procure license to land goods; or the
      giving an account of a ship's cargo to the officer of the
      customs, and obtaining his permission to land the goods.
      See Enter, v. t., 8, and Entrance, n., 5.
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   5. (Law)
      (a) The actual taking possession of lands or tenements, by
          entering or setting foot on them.
      (b) A putting upon record in proper form and order.
      (c) The act in addition to breaking essential to
          constitute the offense or burglary. --Burrill.
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   Bill of entry. See under Bill.

   Double entry, Single entry. See Bookkeeping.

   Entry clerk (Com.), a clerk who makes the original entries
      of transactions in a business.

   Writ of entry (Law), a writ issued for the purpose of
      obtaining possession of land from one who has unlawfully
      entered and continues in possession. --Bouvier.
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WordNet (r) 3.0 (2006):

single entry
    n 1: a simple bookkeeping system; transactions are entered in
         only one account [syn: single entry, single-entry
         bookkeeping]