noun (n)

• a long depression in the surface of the land that usually contains a river

  panjang depresi di permukaan tanah yang biasanya mengandungi sungai

  Synonym:
  vale
  

  source: wordnet30
• The space inclosed between ranges of hills or mountains; the strip of land at the bottom of the depressions intersecting a country, including usually the bed of a stream, with frequently broad alluvial plains on one or both sides of the stream. Also used figuratively.

  ruang inclosed antara gunung atau bukit pegunungan; jalur tanah di bahagian bawah depresi berpotongan negara, termasuk biasanya katil dari sungai, dengan kerap luas alluvial dataran di satu atau kedua sisi sungai. juga digunakan kiasan.

  source: webster1913