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

sound \sound\, n. as. sund a narrow sea or strait; akin to
   icel., sw., dan.  g. sund, probably so named because it
   could be swum across. see swim. geog.
   a narrow passage of water, or a strait between the mainland
   and an island; also, a strait connecting two seas, or
   connecting a sea or lake with the ocean; as, the sound
   between the baltic and the german ocean; long island sound.
   1913 webster

         the sound of denmark, where ships pay toll. --camden.
   1913 webster

   sound dues, tolls formerly imposed by denmark on vessels
      passing through the baltic sound.
      1913 webster
see also:
swim sound dues 

Sound >> S Words
Sound, definition of term: Sound
sound_pag1.html

Sound Off >> S Words
Sound Off, definition of term: Sound Off
sound+off_pag1.html

Sound Wave >> S Words
Sound Wave, definition of term: Sound Wave
sound+wave_pag1.html

Sound Pollution >> S Words
Sound Pollution, definition of term: Sound Pollution
sound+pollution_pag1.html

Sound Effect >> S Words
Sound Effect, definition of term: Sound Effect
sound+effect_pag1.html

Sound Barrier >> S Words
Sound Barrier, definition of term: Sound Barrier
sound+barrier_pag1.html

Sound Bite >> S Words
Sound Bite, definition of term: Sound Bite
sound+bite_pag1.html

Sound Card >> S Words
Sound Card, definition of term: Sound Card
sound+card_pag1.html

Speech Sound >> S Words
Speech Sound, definition of term: Speech Sound
speech+sound_pag1.html