Definition of "caustic" in English

adjective

1. Capable of burning, corroding or destroying organic tissue.

2. (of language, etc.) Sharp, bitter, cutting, biting, and sarcastic in a scathing way.

noun

1. Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.

2. (optics, computer graphics) The envelope of reflected or refracted rays of light for a given surface or object.

3. (mathematics) The envelope of reflected or refracted rays for a given curve.

4. (informal, chemistry, uncountable) Caustic soda.