1.
To ~ something means to remove it completely or put an end to it.
The long-range goal must be to ~ nuclear weapons altogether.
PHRASAL VERB: V P P n
2.
If one person does away with another, the first murders the second. If you ~ yourself, you kill yourself. (INFORMAL)
...a woman whose husband had made several attempts to ~ her.
PHRASAL VERB: V P P n, also V P P pron-refl