Redline Definition
rĕdlīn
red-line, redlined, redlines, redlining
verb
To refuse to provide loans or insurance in (a neighborhood) by redlining.
Webster's New World
To attain the maximum safe speed, power, etc.
A car that redlines at 7,500 rpm.
Webster's New World
To mark or highlight edited text, as with a red line, to distinguish it from unedited portions of a document.
American Heritage
To practice redlining in (an area or community), as in declining to provide mortgages.
American Heritage
To remove from operational status because of mechanical defects or the need for scheduled maintenance.
Redlined three fighter aircraft.
American Heritage
noun
A safety limit, as marked on a gauge.
American Heritage
The maximum safe speed, power, etc. of an engine, usually indicated by a red line or mark on a gauge, as a tachometer.
Webster's New World
The red line at the center of an ice hockey rink, running parallel to the goal lines and dividing the rink in half.
American Heritage
Either of two red lines running across an ice hockey rink near the end boards, in the center of which the goal is positioned.
American Heritage
A drawing, document, etc. that has been marked for correction or modification.
Wiktionary
Origin of Redline
-
A compound of red + line, recalling the frequent use of red pen or pencil to mark corrections on drawings and documents (1), and the red markings on a tachometer (2).
From Wiktionary
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