definition of
scab

[1] #1 scab v. form a scab; "the wounds will eventually scab". wn

[2] #2 scab n. [strikebreaker, blackleg, rat] someone who works (or provides workers) during a strike. wn

[3] #3 scab n. the crustlike surface of a healing skin lesion. wn

[4] #4 scab v. [fink, rat, blackleg] take the place of work of someone on strike. wn