Source : Webster's Revised Unabridged Dictionary (1913)

Single \Sin"gle\, v. i.
   To take the irrregular gait called single-foot;- said of a
   horse. See {Single-foot}.

         Many very fleet horses, when overdriven, adopt a
         disagreeable gait, which seems to be a cross between a
         pace and a trot, in which the two legs of one side are
         raised almost but not quite, simultaneously. Such
         horses are said to single, or to be single-footed. --W.
                                                  S. Clark.

Single \Sin"gle\, n.
   1. A unit; one; as, to score a single.

   2. pl. The reeled filaments of silk, twisted without doubling
      to give them firmness.

   3. A handful of gleaned grain. [Prov. Eng. & Scot.]

   4. (Law Tennis) A game with but one player on each side; --
      usually in the plural.

   5. (Baseball) A hit by a batter which enables him to reach
      first base only.

Single \Sin"gle\, v. t. [imp. & p. p. {Singled}; p. pr. & vb. n.
   {Singling}.]
   1. To select, as an individual person or thing, from among a
      number; to choose out from others; to separate.

            Dogs who hereby can single out their master in the
            dark.                                 --Bacon.

            His blood! she faintly screamed her mind Still
            singling one from all mankind.        --More.

   2. To sequester; to withdraw; to retire. [Obs.]

            An agent singling itself from consorts. --Hooker.

   3. To take alone, or one by one.

            Men . . . commendable when they are singled.
                                                  --Hooker.

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.

            No single man is born with a right of controlling
            the opinions of all the rest.         --Pope.

   2. Alone; having no companion.

            Who single hast maintained, Against revolted
            multitudes, the cause Of truth.       --Milton.

   3. Hence, unmarried; as, a single man or woman.

            Grows, lives, and dies in single blessedness.
                                                  --Shak.

            Single chose to live, and shunned to wed. --Dryden.

   4. Not doubled, twisted together, or combined with others;
      as, a single thread; a single strand of a rope.

   5. Performed by one person, or one on each side; as, a single
      combat.

            These shifts refuted, answer thy appellant, . . .
            Who now defles thee thrice ti single fight.
                                                  --Milton.

   6. Uncompounded; pure; unmixed.

            Simple ideas are opposed to complex, and single to
            compound.                             --I. Watts.

   7. Not deceitful or artful; honest; sincere.

            I speak it with a single heart.       --Shak.

   8. Simple; not wise; weak; silly. [Obs.]

            He utters such single matter in so infantly a voice.
                                                  --Beau. & Fl.

   {Single ale}, {beer}, or {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.

Source : WordNet®

single
     adj 1: existing alone or consisting of one entity or part or aspect
            or individual; "upon the hill stood a single tower";
            "had but a single thought which was to escape"; "a
            single survivor"; "a single serving"; "a single lens";
            "a single thickness" [syn: {single(a)}] [ant: {multiple}]
     2: used of flowers having usually only one row or whorl of
        petals; "single chrysanthemums resemble daisies and may
        have more than one row of petals" [ant: {double}]
     3: not married or related to the unmarried state; "unmarried
        men and women"; "unmarried life"; "sex and the single
        girl"; "single parenthood"; "are you married or single?"
        [syn: {unmarried}] [ant: {married}]
     4: characteristic of or meant for a single person or thing; "an
        individual serving"; "separate rooms"; "single occupancy";
        "a single bed" [syn: {individual}, {separate}, {single(a)}]
     5: having uniform application; "a single legal code for all"
        [syn: {single(a)}]
     6: not divided among or brought to bear on more than one object
        or objective; "judging a contest with a single eye"; "a
        single devotion to duty"; "undivided affection"; "gained
        their exclusive attention" [syn: {single(a)}, {undivided},
         {exclusive}]
     7: involved two individuals; "single combat" [syn: {single(a)}]
     8: individual and distinct; "pegged down each separate branch
        to the earth"; "a gift for every single child" [syn: {separate},
         {single(a)}]

single
     n 1: a base hit on which the batter stops safely at first base
     2: the smallest whole number or a numeral representing this
        number; "he has the one but will need a two and three to
        go with it"; "they had lunch at one" [syn: {one}, {1}, {I},
         {ace}, {unity}]

single
     v : hit a one-base hit