Definition of "greyback" in English

noun

1. (historical, US, colloquial) A Confederate soldier during the US Civil War (because of the grey uniforms).

2. (historical, US, colloquial) A Confederate States dollar during the US Civil War.

3. (dated) A louse.

4. (regional) Any of various grey birds.

5. A kind of paperboard with a smooth white surface on one side and a grey surface on the other side.