1.
If you ~ of a meeting, a performance, or an unpleasant situation, you leave it suddenly, usually in order to show that you are angry or bored.
Several dozen councillors walked out of the meeting in protest...
Mr. Mason walked out during the performance.
PHRASAL VERB: V P of n, V P
2.
If someone walks out on their family or their partner, they leave them suddenly and go to live somewhere else.
Her husband walked out on her...
PHRASAL VERB: V P on n
3.
If workers ~, they stop doing their work for a period of time, usually in order to try to get better pay or conditions for themselves.
Nationwide industrial action began earlier this week, when staff at most banks walked out.
PHRASAL VERB: V P