Definition of critical
1 a : of, relating to, or being a turning point or specially important juncture <a critical phase>: as (1) : relating to or being the stage of a disease at which an abrupt change for better or worse may be expected; also : being or relating to an illness or condition involving danger of death <critical care> <a patient listed in critical condition> (2) : relating to or being a state in which or a measurement or point at which some quality, property, or phenomenon suffers a definite change <critical temperature> b : crucial, decisive <a critical test> c : indispensable, vital <a critical waterfowl habitat> <a component critical to the operation of a machine> d : being in or approaching a state of crisis <a critical shortage> <a critical situation>
2 a : inclined to criticize severely and unfavorably b : consisting of or involving criticism <critical writings>; also : of or relating to the judgment of critics <the play was a critical success> c : exercising or involving careful judgment or judicious evaluation <critical thinking> d : including variant readings and scholarly emendations <a critical edition>
3 a : of sufficient size to sustain a chain reaction —used of a mass of fissionable material <a critical mass> b : sustaining a nuclear chain reaction <the reactor went critical>
criticalityplay \ˌkri-tə-ˈka-lə-tē\ noun
criticallyplay \ˈkri-ti-k(ə-)lē\ adverb
criticalnessplay \-kəl-nəs\ noun
Examples of critical in a sentence
The program presents a critical analysis of the government's strategies.
She has a talent for critical thinking.
We need to look at these proposed changes with a critical eye before we accept them.
First Known Use of critical
Synonym Discussion of critical
synonyms see in addition acute
CRITICAL Defined for English Language Learners
Definition of critical for English Language Learners
: expressing criticism or disapproval
: of or relating to the judgments of critics about books, movies, art, etc.
: using or involving careful judgment about the good and bad parts of something
CRITICAL Defined for Kids
Definition of critical for Students
1 : likely or eager to find fault
2 : consisting of or involving judgment of value, worth, beauty, or quality <critical writings>
3 : using or involving careful judgment <a critical examination of a patient>
4 : extremely important <It is critical that you follow the instructions exactly.>
Word Root of critical
The Greek word kritikos, meaning “able to judge,” gives us the root critic. Words from the Greek kritikos have something to do with judging. A critic is someone who judges the value or quality or something, such as a movie or book. Someone critical makes a lot of judgments and usually decides that things are not good. To criticize is to make a judgment that something is not good.
Medical Definition of critical
1a: relating to, indicating, or being the stage of a disease at which an abrupt change for better or worse may be anticipated with reasonable certainty <the critical phase of a fever>b: being or relating to an illness or condition involving danger of death <critical care> <a critical head injury>
2a: of sufficient size to sustain a chain reaction—used of a mass of fissionable materialb: sustaining a chain reaction—used of a nuclear reactor
Seen and Heard
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