Vir"u*lent (?), a. [L. virulentus, fr. virus poison: cf. F. virulent.
See Virus.] 1. Extremely poisonous or venomous; very active in doing
injury.
A contagious disorder rendered more virulent by uncleanness.
Sir W. Scott.
2. Very bitter in enmity; actuated by a desire to injure; malignant;
as, a virulent invective.