[1] : The Collaborative International Dictionary of English v.0.48

folk \folk\ f=ok, folks \folks\ f=oks, n. collect.  pl.
   as. folc; akin to d. volk, os.  ohg. folk, g. volk, icel.
   f=olk, sw.  dan. folk, lith. pulkas crowd, and perh. to e.
   follow.
   1. eng. hist. in anglo-saxon times, the people of a group
      of townships or villages; a community; a tribe. obs.
      1913 webster

            the organization of each folk, as such, sprang
            mainly from war.                      --j. r. green.
      1913 webster

   2. people in general, or a separate class of people; --
      generally used in the plural form, and often with a
      qualifying adjective; as, the old folks; poor folks.
      colloq.
      1913 webster

            in winter's tedious nights, sit by the fire
            with good old folks, and let them tell thee tales.
                                                  --shak.
      1913 webster

   3. the persons of one's own family; as, our folks are all
      well. colloq. new eng. --bartlett.
      1913 webster

   folk song, one of a class of songs long popular with the
      common people.

   folk speech, the speech of the common people, as
      distinguished from that of the educated class.
      1913 webster
see also:
folk song folk speech 

[2] : WordNet (r) 2.0

folk song
     n : a song that is traditionally sung by the common people of a
         region and forms part of their culture syn: folksong,
         folk ballad
see also:
folksong folk ballad 

Folk Song >> F Words
Folk Song, definition of term: Folk Song
folk+song_pag1.html

Song >> S Words
Song, definition of term: Song
song_pag1.html

Folk >> F Words
Folk, definition of term: Folk
folk_pag1.html

Folk Music >> F Words
Folk Music, definition of term: Folk Music
folk+music_pag1.html

Folk Lore >> F Words
Folk Lore, definition of term: Folk Lore
folk+lore_pag1.html

Folk Ballad >> F Words
Folk Ballad, definition of term: Folk Ballad
folk+ballad_pag1.html

Song And Dance >> S Words
Song And Dance, definition of term: Song And Dance
song+and+dance_pag1.html