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Dictionary definition for: Cardinal

1. (n) (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

2. (s) serving as an essential component; "a cardinal rule" "the central cause of the problem" "an example that was fundamental to the argument" "computers are fundamental to modern industrial structure"

3. (n) the number of elements in a mathematical set; denotes a quantity but not the order

4. (a) being or denoting a numerical quantity but not order; "cardinal numbers"

5. (n) a variable color averaging a vivid red

6. (n) crested thick-billed North American finch having bright red plumage in the male

WordNet 2.1 Copyright Princeton University. All rights reserved.