Sentence for malignant?
The tumor in Jesse's head isn't malignant. In the sentence, malignant means cancerous. Fortunately, Jesse will be fine after surgery.
"Malignant" means especially bad, evil, or (in the case of cancer) deadly. Nowadays, you almost always hear this word applied to cancer, and a malignant cancer would be one that is fast-growing, spreading to other parts of the body, and capable of causing death. I'm afraid the doctor thinks your tumor might be malignant, Mr. Jones.