Meaning & use
malignant
Extremely harmful or evil, or, in medicine, describing a tumor that is cancerous and can spread.
See it in a sentence
Doctors confirmed the tumor was malignant and recommended immediate treatment.
A malignant rumor spread through the office, damaging her reputation within days.
A note on using this word
In medicine, malignant is the direct opposite of benign; elsewhere it describes something deeply harmful or hostile.
Words with a similar meaning
cancerousharmful
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
Write a sentence using “malignant”, then compare your use with the examples above.
Your draft stays on this page and is not sent anywhere.