1 [transitive] informal
to stop having something because you no longer want it:
The government has ditched plans to privatise the prison.
2 [transitive] informal
to end a romantic relationship with someone:
Meg and Neil were due to marry, but she ditched him.
3 [transitive] American English spoken informal
to not go to school, a class etc when you should [= skip British English]
Did you ditch class today?
4 [transitive] American English spoken informal
to leave someone you are with in a place without telling them you are going
5 [intransitive and transitive]TTA
to land an aircraft in a controlled crash into water:
Two balloonists had to ditch during the race.