1. (n.) An incrustation over a sore, wound, vesicle, or pustule, formed by the drying up of the discharge from the diseased part.

2. (n.) The itch in man; also, the scurvy.

3. (n.) The mange, esp. when it appears on sheep.

4. (n.) A disease of potatoes producing pits in their surface, caused by a minute fungus (Tiburcinia Scabies).

5. (n.) A slight irregular protuberance which defaces the surface of a casting, caused by the breaking away of a part of the mold.

6. (n.) A mean, dirty, paltry fellow.

7. (n.) 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.

8. (v. i.) To become covered with a scab; as, the wound scabbed over.