Definition of "Blackadder"

Blackadder

/ˈblækˌæɚ/

proper noun
1. Blackadder Water, a river in the Scottish Borders council area, Scotland, a tributary of Whiteadder Water.
2. A rural locality in the Scottish Borders council area, south of the river (OS grid ref NT8452).
3. A surname, from the river and the adjacent Blackadder House.