What is the meaning of Cardinal?

Of fundamental importance; crucial, pivotal.

Of or relating to the cardinal directions (north, south, east and west).

Describing a "natural" number used to indicate quantity (e.g., zero, one, two, three), as opposed to an ordinal number indicating relative position.

Having a bright red color (from the color of a Catholic cardinal's cassock).

One of the officials appointed by the pope in the Roman Catholic Church, ranking only below the pope and the patriarchs, constituting the special college which elects the pope. (See Wikipedia article on Catholic cardinals.)

Any of a genus of songbirds of the finch family, Cardinalis.

Any of various related passerine birds of the family Cardinalidae (See Wikipedia article on cardinals) and other similar birds that were once considered to be related.

A deep red color, somewhat less vivid than scarlet, the traditional colour of a Catholic cardinal's cassock.

Short for cardinal number, a number indicating quantity, or the size of a set (e.g., 0, 1, 2, 3). (See Cardinal_number.)

Short for cardinal numeral, a word used to represent a cardinal number.

Short for cardinal flower (Lobelia cardinalis), a flowering plant.

Short for cardinal tetra (Paracheirodon axelrodi), a freshwater fish.

A woman's short cloak with a hood, originally made of scarlet cloth.

Mulled red wine.

cardinal

important; paramount

cardinal

cardinal

cardinal number

cardinal (bird)

cardinal (color)

Apocopic form of cardinale

cardinal.

cardinal (describing a number that indicates quantity)

cardinal (number indicating quantity)

hash (the # symbol)

principal, essential, fundamental

cardinal

cardinal (bird)

a variety of grape, cultivated for consumption

cardinal (crucial, pivotal)

cardinal (describing a number used to indicate quantity)

cardinal (Roman Catholic official)

cardinal (bird)

Source: wiktionary.org