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  1. Dictionary
    poisonous
    /ˈpɔɪzənəs/

    adjective

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishPOISONOUS | English meaning - Cambridge Dictionary

    Poisonous means very harmful and able to cause illness or death, or a poisonous animal or insect that uses poison to defend itself. Learn more about the word, its synonyms, and how to use it in sentences with examples from the Cambridge English Corpus.

  3. www.merriam-webster.com › dictionary › poisonousPoisonous Definition & Meaning - Merriam-Webster

    Learn the meaning of poisonous, a word that describes something that is harmful or causes injury or death. See synonyms, examples, word history, and related entries for poisonous.

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  5. www.dictionary.com › browse › poisonousPOISONOUS Definition & Meaning | Dictionary.com

    Poisonous means full of or containing poison, harmful, destructive, or deeply malicious. Learn the origin, synonyms, and comparisons of poisonous with venomous, and see how to use it in sentences.

  6. dictionary.cambridge.org › us › dictionaryPOISONOUS | definition in the Cambridge English Dictionary

    Poisonous means very harmful and able to cause illness or death, or a poisonous animal or insect that uses poison to defend itself. Learn more about the word, its synonyms, and how to use it in sentences with examples from various sources.

  7. www.collinsdictionary.com › dictionary › englishPOISONOUS definition and meaning | Collins English Dictionary

    Learn the meaning of poisonous as an adjective to describe something or someone that can harm or kill by or as by poison. See synonyms, pronunciation, collocations and sentences with poisonous.

  8. www.thefreedictionary.com › poisonousPoisonous - definition of poisonous by The Free Dictionary

    Poisonous means containing or being a poison, or capable of harming or killing by poison. Learn the synonyms, antonyms, translations and usage of poisonous in different contexts.

  9. www.vocabulary.com › dictionary › poisonousPoisonous - Definition, Meaning & Synonyms | Vocabulary.com

    If something is poisonous, you'd better not eat, drink, inhale, or touch it: it will make you sick. Some poisonous materials can even kill you. Of course, this adjective is derived from the noun poison, which is a toxic substance. You can also calls things poisonous if they're harmful in less physical ways.