1. A furrow between two ridges, to drain off the surface water.


  1. painstaking and careful not to miss or omit any detail
    The Prime Minister announced a thorough investigation into the death of a father of two in police custody.
    He is the most thorough worker I have ever seen.
    The infested house needs a thorough cleansing before it will be inhabitable.
  2. utter; complete; absolute
    It is a thorough pleasure to see him beg for mercy.

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