DEFINITION OF "STRIKE"

"strike" means the partial or complete concerted refusal to work, or the retardation or obstruction of work, by persons who are or have beenemployed by the same employer or by different employers, for the purpose of remedying a grievance or resolving a dispute in respect of any matterof mutual interest between employer and employee, and every reference to"work" in this definition includes overtime work, whether it is voluntary or compulsory;