Source : Webster's Revised Unabridged Dictionary (1913)

Swain \Swain\, n. [OE. swain, swein, Icel. sveinn a boy,
   servant; akin to Sw. sven, Dan. svend, AS. sw[=a]n, OHG.
   swein.]
   1. A servant. [Obs.]

            Him behoves serve himself that has no swain.
                                                  --Chaucer.

   2. A young man dwelling in the country; a rustic; esp., a
      cuntry gallant or lover; -- chiefly in poetry.

            It were a happy life To be no better than a homely
            swain.                                --Shak.

            Blest swains! whose nymphs in every grace excel.
                                                  --Pope.

Source : WordNet®

swain
     n : a man who is the lover of a girl or young woman; "if I'd
         known he was her boyfriend I wouldn't have asked" [syn: {boyfriend},
          {fellow}, {beau}, {young man}]