D defs.my
Entry 3 senses Webster, 1913

Wash out

/wäsh out/ · IPA
01 v. i. & t. to be removed by washing; -- of spots and stains, especially on clothing.
  1. 1.
    to be removed by washing; -- of spots and stains, especially on clothing.
  2. 2.
    to be removed, broken, or destroyed by the action of flowing water; as, the bridge was washed out by the flood.
  3. 3.
    to fail in a course of study or training, especially to leave before completion of the course.