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Meaning of calling card

call'ing card"

Pronunciation: [key]
  1. a small card with the name and often the address of a person or of a couple, for presenting when making a business or social call, for enclosing in gifts, etc.
  2. any mark, sign, trace, characteristic, or the like by which someone or something can be recognized.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.