Source : Webster's Revised Unabridged Dictionary (1913)

Dale \Dale\, n. [AS. d[ae]l; akin to LG., D., Sw., Dan., OS., &
   Goth. dal, Icel. dalr, OHG. tal, G. thal, and perth. to Gr. ?
   a rotunda, Skr. dh[=a]ra depth. Cf. {Dell}.]
   1. A low place between hills; a vale or valley.

            Where mountaines rise, umbrageous dales descend.
                                                  --Thomson.

   2. A trough or spout to carry off water, as from a pump.
      --Knight.

Source : WordNet®

dale
     n : an open river valley (in a hilly area)