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redline

The maximum speed, temperature, pressure, etc., at which a device (such as the engine in a car, aircraft, etc.) is designed to operate.

ˈɹɛd.laɪnCurrent179 viewsLast reviewed Jun 29, 2026+ Add a definition
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5 citations · last seen May 2026

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#1·Apr 27, 2026

The maximum speed, temperature, pressure, etc., at which a device (such as the engine in a car, aircraft, etc.) is designed to operate.

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#2·Apr 27, 2026

A drawing, document, etc. that has been marked for correction or modification.

Origin: From , 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). Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
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#3·Apr 27, 2026

To mark a drawing or document for correction or modification.

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.
Heard in the wild
  • “if you're looking for something short n sweet I cannot suggest Redline enough.”

    — Bluesky· May 2026
  • “elle est comment la soundtrack de redline? elle est comme ça”

    — Bluesky· May 2026
  • “Has someone run a redline yet? What did they change”

    — Bluesky· May 2026
  • “i mean i get that!! it's usually why i'll ask/send a redline before i fully start, just in case they can't pay anymore lol”

    — Bluesky· May 2026
  • “If you want a candidate who won't take money from: ❌ landlords + developers ❌ AI + crypto ❌ AIPAC ...well, that's me. But if your redline is a donation from Oscar-nominated actor Ed Norton...I'm afraid you'll have to look elsewhere.”

    — Bluesky· May 2026
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