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Meaning & Definition of Crucial in English

English

Crucial

/kruʃəl/

adjective

1. Of extreme importance

  • Vital to the resolution of a crisis
  • "A crucial moment in his career"
  • "A crucial election"
  • "A crucial issue for women"
    synonym:
  • crucial
  • ,
  • important

2. Having crucial relevance

  • "Crucial to the case"
  • "Relevant testimony"
    synonym:
  • crucial

3. Of the greatest importance

  • "The all-important subject of disarmament"
  • "Crucial information"
  • "In chess cool nerves are of the essence"
    synonym:
  • all-important(a)
  • ,
  • all important(p)
  • ,
  • crucial
  • ,
  • essential
  • ,
  • of the essence(p)

Examples of using

The scientist participated in developing high-voltage switches, a key component crucial for setting off explosions needed to trigger nuclear warhead.