a small sheet of stiffened paper or plastic, usually with information printed on it and having various uses
a piece of stiffened paper usually with a picture on the front and a message inside, sent to a person by post on special occasions, such as a birthday or at Christmas; a postcard
any of a set of 52 small sheets of stiffened paper marked to show their number and the class they belong to, and used for various games
sth such as a very effective argument or course of action, which gives one an advantage and which one keeps often secretly until the right moment
"he collected cards and traded them with the other boys"
"he had to show his card to get in"
"they sent us a card from Miami"
"a poster advertised the coming attractions"
"you have to turn in your card to get a handicap"
"the menu was in French"
"the managers presented their cards to the umpire at home plate"
"I was carded when I tried to buy a beer!"
That Law..is the Card to guide the World by.