A large, venomous serpent (Trigonocephalus
lanceolatus) of Brazil and the West Indies. It is allied to the
rattlesnake, but has no rattle.
1. To make or render black. While the long funerals blacken all the way. Pope 2. To make dark; to darken; to cloud. "Blackened the whole heavens." South. 3. To defame; to sully, as reputation; to make infamous; as, vice blackens the character. Syn. ...