Definitions of ditch:

• noun:   a long narrow excavation in the earth
• noun:   any small natural waterway
• verb:   forsake

  Example: "Ditch a lover"

• verb:   crash or crash-land

  Example: "Ditch a car"

• verb:   make an emergency landing on water
• verb:   sever all ties with, usually unceremoniously or irresponsibly
• verb:   throw away
• verb:   cut a trench in, as for drainage

  Example: "Ditch the land to drain it"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #17382)