noun
Definition: A flat, usually rectangular piece of stiff paper, cardboard, or plastic that can be used for various purposes, such as identification, payment, or games.
Example: I handed my business card to the client during the meeting.
transitive verb
Definition: To warn or remove a player in sports by showing a colored card, or to check someone's identification to confirm their age.
Example: The referee decided to card the player for his aggressive behavior during the match.