Meaning ofblackenin English

Verb

1. to cause something to become black (in color)
   The fire blackened the walls of the old building.
2. to defame someone's reputation; damage their image
   The company tried to blacken their competitor's reputation.
3. to cook food quickly in a hot pan (with pepper, etc.)
   She learned to blacken shrimp in a hot skillet with garlic.
4. to make something dirty; cover with grime
   The pollution began to blacken the once pristine river.