Definitions

1. verb

to become or make something black in color

“The fire began to blacken the walls of the room.”

2. verb

to damage or spoil something by causing a black mark or stain

“Smoking blackened the teeth of the old pipe.”

3. verb

to make something seem worse or more serious by describing it in a very negative way

“The media blackened the reputation of the company by printing false rumors.”

4. verb

to make something darker in color

“The sun will blacken the sky with clouds.”

5. noun

a black mark or stain

“The blacken on my shirt is from the spilled coffee.”