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English definition of “caustic”

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caustic

adjective uk   /ˈkɔː.stɪk/ us    /ˈkɑː-/

caustic adjective (CHEMICAL)

A caustic chemical burns or destroys things, especially anything made of living cells: a caustic substance

caustic adjective (WORDS)

A caustic remark or way of speaking is hurtful, critical, or intentionally unkind: caustic comments She's famous in the office for her caustic wit.
caustically
adverb uk   /ˈkɔː.stɪ.kəl.i/ us    /ˈkɑː-/
(Definition of caustic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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