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Cardinal (Noun)

(Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes.

Nouns denoting people.

The cardinal was summoned to Rome to participate in the conclave to elect a new Pope.
He was elevated to cardinal by the Pope in recognition of his years of service to the Church.
The College of Cardinals is composed of senior bishops from around the world who advise the Pope on matters of faith and morals.
As a cardinal, he was entitled to wear the distinctive red biretta and to participate in the election of a new Pope.
The cardinal's role in the Church is to provide counsel to the Pope and to help govern the worldwide Catholic community.

The number of elements in a mathematical set; denotes a quantity but not the order.

Nouns denoting quantities and units of measure.

The cardinal number of the set of integers is infinite.
In set theory, the cardinal of a set is a measure of the number of elements it contains.
The cardinality of the set of real numbers is greater than that of the set of natural numbers.
The cardinal of a finite set is simply the number of elements it contains.
In mathematics, the cardinal of a set is often denoted by the symbol |A|, where A is the set.

A variable color averaging a vivid red.

Nouns denoting attributes of people and objects.

The cardinal's plumage was a vibrant display of color, averaging a deep, rich red that stood out against the duller hues of the surrounding foliage.
In the stillness of the morning, the bright red berries on the holly bush shone like a cardinal's crest, adding a splash of color to the winter landscape.
The team's uniforms featured a cardinal color scheme, with the deep red jerseys and helmets evoking a sense of boldness and energy.
The stained glass window in the old church filtered the sunlight, casting a kaleidoscope of colors across the floor, including a cardinal red that seemed to pulse with an inner light.
The lipstick she chose was a cardinal shade, a bold and vibrant red that added a pop of color to her overall look.

Crested thick-billed North American finch having bright red plumage in the male.

Nouns denoting animals.

The male northern cardinal's bright red plumage makes it a stunning sight in the backyard bird feeder.
During the spring breeding season, the northern cardinal sings its song from the highest branches of trees.
In some states, the northern cardinal is designated as the official state bird, including Illinois and Indiana.
Cardinals are common visitors to gardens with shrubs that provide berries and seeds, which they use for food.
At dawn, a chorus of cardinals begins singing their melodies in a local forest filled with conifers.