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1. Harmful, malevolent, injurious. (

2. Dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor). (

1. Harmfully cancerous; as a malignant tumor. (

Word origin: From Middle French malignant and directly from Late Latin malignantem (nominative malignans) “acting from malice,” present participle of malignare “injure maliciously.”

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