- Dyed twice; thoroughly or intensely coloured.
- (figuratively) Firmly fixed in opinions or habits; confirmed; inveterate.
- a double-dyed villain
- 1815, Jane Austen, Emma, volume II, chapter 14:
- "People who have extensive grounds themselves are always pleased with any thing in the same style" Emma doubted the truth of this sentiment. She had a great idea that people who had extensive grounds themselves cared very little for the extensive grounds of any body else; but it was not worth while to attack an error so double-dyed […]