Redline
Maximum engine speed
Redline refers to a critical limit not to be exceeded.
In engines, the redline is the maximum safe RPM, marked in red on tachometers: Don't redline the engine.
In housing, to redline is to deny services to certain neighborhoods based on demographics—a discriminatory practice outlawed but historically devastating to minority communities.
As a verb in editing, to redline a document is to mark it up with proposed changes, from the red ink traditionally used: Legal redlined the contract.
Rotational speed indicator
- RPMTurns in sixty seconds
- engineMachine producing motion
- shiftMovement or work period
- racingSpeed competition sport
horsepower · dashboard · throttle · performance · powertrain · speedometer · turbo · nitrous
Greatest permitted quantity
- thresholdPoint of beginning
- boundaryLine marking a limit
- capCovering for top
- ceilingRoom's upper surface
critical · cutoff · tolerance · extreme · peak · margin · constraint · overflow
Line negating text
- markupAdded percentage for profit
- revisionAltering to improve
- correctionFixing of mistakes
- deletionRemoval of content
proofreading · manuscript · draft · annotation · margin · blue-pencil · copyedit · amendment
Discussion seeking mutual accord
- clauseProvision in agreement
- amendmentChange to official text
- termsConditions of an agreement
- revisionAltering to improve
markup · legal · strikeover · provision · counteroffer · modification · stipulation · concession
tachometer
Rotational speed indicator
racing · horsepower · dashboard · throttle · performance · powertrain · speedometer · turbo · nitrous · dyno
maximum
Greatest permitted quantity
ceiling · critical · cutoff · tolerance · extreme · peak · margin · constraint · overflow · saturation
strikethrough
Line negating text
- markupAdded percentage for profit
- revisionAltering to improve
- correctionFixing of mistakes
deletion · proofreading · manuscript · draft · annotation · margin · blue-pencil · copyedit · amendment · insertion
negotiation
Discussion seeking mutual accord
revision · markup · legal · strikeover · provision · counteroffer · modification · stipulation · concession · bargaining
metro
Urban rail transit
station · train · rail · Braintree · platform · transit · underground · route · passenger · fare
boundary
Line marking a limit
- borderOuter edge or limit
- demarcationFormal boundary setting
- restrictedLimited in scope
military · no-fly · ceasefire · partition · territory · frontline · armistice · DMZ · buffer · jurisdiction
Redlineidle
Without activity or purpose
idling · baseline · cruising speed · coasting
Redlinegreenline
Color-coded transit line
fair lending · equal access · fair housing · open access · non-discrimination