[ˈrɛdlʌɪn], (Verb)

Definitions:
- drive with (a car engine) at or above its rated maximum revolutions per minute
(e.g: both his engines were redlined now)

- refuse (a loan or insurance) to someone because they live in an area deemed to be a poor financial risk
(e.g: banks have redlined loans to buyers)


Phrases:

Origin:
from the use of red as a limit marker, in redline a limit marked out by ringing a section of a map

[ˈrɛdlʌɪn], (Noun)

Definitions:
- the maximum number of revolutions per minute for a car engine
(e.g: just over halfway to its 5200 rpm redline)

- a boundary or limit which should not be crossed


Phrases:

Origin:
from the use of red as a limit marker, in redline a limit marked out by ringing a section of a map