Definition of "undrown"

undrown

verb
third-person singular simple present undrowns, present participle undrowning, simple past and past participle undrowned
1. (rare, transitive) To remove the water from (something drowned or flooded); to unflood.
  Quotations
  All available pumps were put into action to undrown the fifty-acre working area behind it.
  1956, Helen Marie Newell, The Hardhats, page 210
  Recent uplift of the Maine and Oregon coasts has not been enough to "undrown" the larger valleys; the shorelines are still submergent.
  1971, George Finiel Adams, Jerome Wyckoff, Landforms, page 143