Biting; caustic; sarcastic; keen; severe.
- Bitingly sarcastic: mordant satire.
- Incisive and trenchant: an inquisitor's mordant questioning.
- Bitingly painful.
- Serving to fix colors in dyeing.
- A reagent, such as tannic acid, that fixes dyes to cells, tissues, or textiles or other materials.
- A corrosive substance, such as an acid, used in etching.
- To treat with a mordant.