redline

plural redlines

1. A drawing, document, etc. that has been marked for correction or modification.
2. The maximum speed, temperature, pressure, etc., at which a device (such as the engine in a car, aircraft, etc.) is designed to operate.

present singular third person redlines · participle present redlining · participle past redlined · past redlined

1. To mark a drawing or document for correction or modification.
2. To operate a device at one or more redlines.
   1. automotiveTo run an internal combustion engine to its maximum or maximum recommended speed.
3. CanadaUSurban studiesTo deny or complicate access to services (such as banking, insurance, or healthcare) to residents in specific, often racially determined, areas.

   Already ‘redlined’ by profit-hungry telcos, the inhabitants of poor inner city areas can be shut out of the new on-line services through lack of money.

   1995 September, Richard Barbrook, Andy Cameron, “The Californian Ideology”, in Mute, volume 1, number 3, →ISSN, archived from the original on 19 Oct 2021

   Antonyms: greenline

4. audioTo achieve audio levels that will cause clipping (indicated by red in an audio meter).