2 verb

become red

[intransitive] to become red in the face, for example when you are angry or embarrassed [= blush]:
Susan flushed deeply and looked away.
flush red/crimson/scarlet
Robyn felt her cheeks flush scarlet.
flush with
Mrs Cooper flushed with indignation.


[intransitive and transitive]DHT if you flush a toilet, or if it flushes, you make water go through it to clean it:
Why do children never remember to flush the loo?
She flushed the rest of her drink down the toilet.

clean something

[transitive]DHC to force water through a pipe in order to clean it
flush something through something
They flush clean water through the pipes once a day.

flush somebody/something ↔ out

phrasal verb
1 to make someone leave a place where they are hiding:
The government is determined to flush out the terrorists.
2 to clean something by forcing water through it:
The heating system needs to be flushed out once a year.
Drinking water helps flush out toxins from the body.

Explore TECHNOLOGY Topic