CARDINAL

Definition of CARDINAL

  1. (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
  2. (noun)the number of elements in a mathematical set; denotes a quantity but not the order
  3. (noun)a variable color averaging a vivid red
  4. (noun)crested thick-billed North American finch having bright red plumage in the male
  5. (adj)serving as an essential component
  6. (adj)being or denoting a numerical quantity but not order