1) Strike 2) Strike preceder, sometimes 3) Work stoppage 1) Strike 
In labor disputes, a walkout is a labor strike, the act of employees collectively leaving the workplace as an act of protest. A walkout can also mean the act of leaving a place of work, school, a meeting, a company, or an organization, especially if meant as an expression of protest or disapproval. A walkout can be seen as different from a strike ...
[n] - a strike in which the worker walk out
noun a strike in which the workers walk out