'Scab' definitions:

Definition of 'scab'

(from WordNet)
noun
Someone who works (or provides workers) during a strike [syn: scab, strikebreaker, blackleg, rat]
noun
The crustlike surface of a healing skin lesion
verb
Form a scab; "the wounds will eventually scab"
verb
Take the place of work of someone on strike [syn: fink, scab, rat, blackleg]

Definition of 'Scab'

From: GCIDE
  • Scab \Scab\, v. i. [imp. & p. p. Scabbed; p. pr. & vb. n. Scabbing.]
  • 1. To become covered with a scab; as, the wound scabbed over. [1913 Webster]
  • 2. to take the place of a striking worker. [PJC]

Definition of 'Scab'

From: GCIDE
  • Scab \Scab\ (sk[a^]b), n. [OE. scab, scabbe, shabbe; cf. AS. scaeb, sceabb, scebb, Dan. & Sw. skab, and also L. scabies, fr. scabere to scratch, akin to E. shave. See Shave, and cf. Shab, Shabby.]
  • 1. An incrustation over a sore, wound, vesicle, or pustule, formed by the drying up of the discharge from the diseased part. [1913 Webster]
  • 2. The itch in man; also, the scurvy. [Colloq. or Obs.] [1913 Webster]
  • 3. The mange, esp. when it appears on sheep. --Chaucer. [1913 Webster]
  • 4. A disease of potatoes producing pits in their surface, caused by a minute fungus (Tiburcinia Scabies). [1913 Webster]
  • 5. (Founding) A slight irregular protuberance which defaces the surface of a casting, caused by the breaking away of a part of the mold. [1913 Webster]
  • 6. A mean, dirty, paltry fellow. [Low] --Shak. [1913 Webster]
  • 7. A nickname for a workman who engages for lower wages than are fixed by the trades unions; also, for one who takes the place of a workman on a strike. [Cant] [1913 Webster]
  • 8. (Bot.) Any one of various more or less destructive fungus diseases attacking cultivated plants, and usually forming dark-colored crustlike spots. [Webster 1913 Suppl.]