Of the nature of or characterized by contagion; communicating disease or corruption by contact; infectious. Also figurative.

Tending to corrupt spiritually; morally corrupting. Obsolete.

= infectious, adj. 4.

Morally destructive or corrupting; conveying an evil influence; malevolent, malignant.

Tending or liable to infect or contaminate character, morals, etc. Now rare.

Poisonous.