Ditch (fortification) definition

(1) A long narrow excavation in the earth

(2) Any small natural waterway

(3) Cut a trench in, as for drainage

"Ditch the land to drain it"

"Trench the fields"

(4) Crash or crash-land

"Ditch a car"

"Ditch a plane"

(5) Make an emergency landing on water

(6) Sever all ties with, usually unceremoniously or irresponsibly

"The company dumped him after many years of service"

"She dumped her boyfriend when she fell in love with a rich man"

(7) Throw away

"Chuck these old notes"

(8) Forsake

"Ditch a lover"