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Definition of toxic adjective from the Oxford Advanced Learner's Dictionary

toxic

adjective
 
/ˈtɒksɪk/
 
/ˈtɑːksɪk/
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  1. containing poison; poisonous
    • toxic chemicals/fumes/gases/substances
    • to dispose of toxic waste
    • Many pesticides are highly toxic.
    • toxic to somebody/something This chemical is toxic to many forms of life.
    opposite non-toxicTopics The environmentc1
    Oxford Collocations Dictionaryverbs
    • be
    • prove
    • stay
    adverb
    • extremely
    • fairly
    • very
    preposition
    • to
    See full entry
  2. toxic debt/loan/asset/investment a level of debt or high-risk investment that causes very serious problems for a bank or other financial institution
    Oxford Collocations Dictionaryverbs
    • be
    • prove
    • stay
    adverb
    • extremely
    • fairly
    • very
    preposition
    • to
    See full entry
  3. (informal, disapproving) (of a person, relationship or situation) very unpleasant, especially in the way somebody likes to control and influence other people in a dishonest way
    • I felt trapped in this toxic relationship.
    • The political situation is highly toxic.
    • the toxic atmosphere that now exists in political life
    Oxford Collocations Dictionaryverbs
    • be
    • prove
    • stay
    adverb
    • extremely
    • fairly
    • very
    preposition
    • to
    See full entry
  4. Word Originmid 17th cent.: from medieval Latin toxicus ‘poisoned’, from Latin toxicum ‘poison’, from Greek toxikon (pharmakon) ‘(poison for) arrows’, from toxon ‘bow’.
See toxic in the Oxford Advanced American DictionarySee toxic in the Oxford Learner's Dictionary of Academic English
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