[bak-shawr, -shohr]
noun Geology.
  1. the zone of the shore or beach above the high-water line, acted upon only by severe storms or exceptionally high tides.
  2. the area immediately adjacent to a sea cliff.
  3. berm(def 3).

Origin of backshore

First recorded in 1915–20; back1 + shore1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

backshore in Science


  1. The area of a shore that lies between the average high tide mark and the vegetation. The backshore is affected by waves only during severe storms. Compare foreshore.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.