transitive verb
1.
a. : to cover a green manure crop, crop residues, or barnyard manure by plowing
b. : to plow a field of a growing unharvested crop
2. : to cause to disappear : bury , overwhelm
let us not plow under the family farmer — A.E.Stevenson b.1900
talented students … were too often plowed under — E.A.Weeks