crucial

adjective cru·cial \ ˈkrü-shəl \
Updated on: 17 Nov 2017

Definition of crucial

1 archaic :cruciform
2 a :important or essential as resolving a crisis :decisive
  • She played a crucial role in the negotiations.
b :marked by final determination of a doubtful issue
  • the crucial game of a series
c :important, significant
  • … what use we make of them will be the crucial question.
  • —Stanley Kubrick
  • Vitamins are crucial for maintaining good health.

Examples of crucial in a Sentence

  1. Vitamins are crucial for maintaining good health.

  2. It's crucial that we arrive before 8 o'clock.

  3. Teachers are crucial to the success of the school.

  4. She played a crucial role in the meeting.

Recent Examples of crucial from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'crucial.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of crucial

French, from Latin cruc-, crux cross

Synonym Discussion of crucial

acute, critical, crucial mean of uncertain outcome. acute stresses intensification of conditions leading to a culmination or breaking point.
    • an acute housing shortage
critical adds to acute implications of imminent change, of attendant suspense, and of decisiveness in the outcome.
    • the war has entered a critical phase
crucial suggests a dividing of the ways and often a test or trial involving the determination of a future course or direction.
    • a crucial vote

CRUCIAL Defined for English Language Learners

crucial

adjective

Definition of crucial for English Language Learners

  • : extremely important


CRUCIAL Defined for Kids

crucial

adjective cru·cial \ ˈkrü-shəl \

Definition of crucial for Students

1 :being a final or very important test or decision :decisive
  • a crucial battle
2 :very important :significant
  • Water is a crucial element in our weather.


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