Definitions

cardinal

[kahr-dn-l] / ˈkɑr dn l /

ADJECTIVE

important, key

Synonyms

STRONGEST

overriding

STRONG

basic central chief essential first fundamental leading main primary prime principal ruling

WEAK

basal bottom-line constitutive foremost greatest highest indispensable overruling paramount pivotal preeminent vital

Antonyms

STRONG

additional auxiliary extra inessential inferior last least minor nonessential outside peripheral secondary subordinate trivial unimportant unnecessary

WEAK

insignificant negligible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Her crime, she believes, is “the cardinal scientific sin of anthropomorphizing trees by using the metaphor of the mother tree.”

From The Wall Street Journal • Apr. 17, 2026

Jean-Paul Vesco, the Franco-Algerian cardinal of the Catholic Church who serves as the Archbishop of Algiers, wrote in a statement.

From Barron's • Feb. 26, 2026

It said the cardinal "distances himself from Monsignor Micheletti's statements and expresses his disappointment over what happened" and stated its "commitment to the protection of its artistic and spiritual heritage" against misuse or exploitation.

From BBC • Feb. 3, 2026

Before Robby and Al-Hashimi engage in any real ideological tussles, though, she commits the cardinal sin of suggesting they change the trauma center’s nickname to something else.

From Salon • Jan. 8, 2026

I was still so angry that I was about to violate one of the cardinal rules that Gopal had taught me.

From "The View From Saturday" by E.L. Konigsburg

Vocabulary lists containing cardinal

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Out of My Mind

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