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ignition lock

ignition lock

5.1
A part in a car that stops the engine from starting without the right key
  • noun
  • /ɪɡˈnɪʃən lɑk/
  • Specialized
translation icon : cerradura de encendido
  • The mechanic explained that the ignition lock prevents anyone from starting the car without the correct key.

Examples

  • The car wouldn't start because of a faulty ignition lock that needed a new key.

  • After losing my key, I had to replace the entire ignition lock to get my vehicle working again.

  • 's failed ignition lock cylinder, the Saturday-morning mechanic hoped a shortcut would trim the three-hour job, as detailed in the shop manual, down to an hour or so.

    Academic text (2002)

Synonyms

lock
vsignition lock
523 1.0

A device that holds doors or containers closed with a key

focuses specifically on preventing engine start inside the starting system
interlock
vsignition lock
  • Specialized
7 6.9

A safety device that stops a machine from starting unless it is safe to use

requires the correct key rather than broader safety checks before start
immobilizer
vsignition lock
  • Specialized
1 6.6

A device attached to a car that stops it being started or moved without the correct key

is narrower and works inside the starting system to block engine start
ignition interlock
vsignition lock
  • Specialized
1 6.6

A device put in a car that prevents the engine from starting if it detects alcohol on the driver's breath

requires the correct key rather than external condition checks
keylock
vsignition lock
3.5

A lock you open by putting a key in and turning it

is fitted to the starting mechanism to stop engine starting without a key

Surface Forms

ignition lock singular

Morphology

ignition + lock

The meaning is directly derivable from combining 'ignition' (the engine start system) with 'lock' (a mechanical fastening) — i.e. a lock that prevents the ignition from being used. This is a straightforward noun–noun compound following common compositional patterns (and similar constructions exist in many languages), so learners who know both constituents will readily understand it.

Etymology

Ignition lock comes from early cars when a metal lock was fitted over the ignition, the part you turn with a key. If you did not have the right key the lock stopped the ignition from turning and 'starting' the engine, so it means 'a lock that prevents a car being started without the correct key'.