- actively poisonous; intensely noxious: a virulent insect bite.
- highly infective; malignant or deadly.
- causing clinical symptoms.
- violently or spitefully hostile.
- intensely bitter, spiteful, or malicious: a virulent attack.
- (of a microorganism) extremely infective
- (of a disease) having a rapid course and violent effect
- extremely poisonous, injurious, etc
- extremely bitter, hostile, etc
