American Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition black out in American English

black out phrasal verb

phrasal verb
1

to suddenly become unconscious

Example

He had blacked out after his car hit the tree.

Synonyms and related words
2

to prevent someone from reading or seeing something by covering it with something dark

Example

Half the pages in the report had been blacked out for security reasons.

Synonyms and related words
3

to make a place dark by turning off all the lights, for example so that the enemy cannot see a place at night.

Synonyms and related words
Definition black out in American English