scab: Meaning and Definition of

scab

1. the incrustation that forms over a sore or wound during healing.
2. a mangy disease in animals, esp. sheep; scabies. Cf.(def. 10).
1. a disease of plants characterized by crustlike lesions on the affected parts and caused by a fungus or bacterium.
2. one of these crustlike lesions.
4. a worker who refuses to join a labor union or to participate in a union strike, who takes a striking worker's place on the job, or the like.
5. a rascal or scoundrel.
1. a projection or roughness on an ingot or casting from a defective mold.
2. a surface defect on an iron or steel piece resulting from the rolling in of scale.
7. a short, flat piece of wood used for various purposes, as binding two timbers butted together or strengthening a timber at a weak spot.

1. to become covered with a scab.
2. to act or work as a scab.