Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

ignition

play
noun ig·ni·tion \ig-ˈni-shən\

Simple Definition of ignition

  • : the electrical system in an engine that causes the fuel to burn so that the engine begins working

  • : the device that is used to start a car's engine

  • : the act of causing something to start burning : the act of igniting something

Full Definition of ignition

  1. 1 :  the act or action of igniting: as a :  the starting of a fire b :  the heating of a plasma to a temperature high enough to sustain nuclear fusion

  2. 2 a :  the process or means (as an electric spark) of igniting a fuel mixture b :  a device that activates an ignition system (as in an automobile) <put the key in the ignition>


IGNITION Defined for Kids

ignition

play
noun ig·ni·tion \ig-ˈni-shən\

Definition of ignition

  1. 1 :  the act of causing something to start burning

  2. 2 :  the process or means (as an electric spark) of causing the fuel in an engine to burn so that the engine begins working

  3. 3 :  a device that is used to start a motor vehicle <Put the key in the ignition.>





Seen and Heard

What made you want to look up ignition? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ