redline

Meanings

Plural: redlines

Verb

discriminate in selling or renting housing in certain areas of a neighborhood
To mark a drawing or document for correction or modification.
To operate a device at one or more redlines.
To operate a device at one or more redlines.
To run an internal combustion engine to its maximum or maximum recommended speed.
To deny or complicate access to services (such as banking, insurance, or healthcare) to residents in specific, often racially determined, areas.
To achieve audio levels that will cause clipping (indicated by red in an audio meter).

Noun

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

Origin / Etymology

From red + line, originating with the frequent use of red pen or pencil to mark corrections on drawings and documents (1), and the red markings on a tachometer (2).

Antonyms

greenline

Scrabble Score: 8

redline is a valid Scrabble (US) TWL word
redline is a valid Scrabble Word in Merriam-Webster MW Dictionary
redline is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 10

redline is a valid Words With Friends word