society > occupation and work > working > labour relations > participate in labour relations [verb (transitive)] > summon (workers) to strike > break (strike) > label as strike-breaker (2)
transitive. To treat or label (a person or a firm employing scab labour) as a scab; to ostracize (a person who is a scab). rare.
transitive. To declare to be black (black, adj. 13b) in an industrial dispute. Cf. blacklist, v.