card

• thin and flat object; playing card; postcard; expansion card, circuit board that expands a computer's capabilities (computers); machine for separating cotton or wool fibers in preparation for spinning; employees documents held by an employer (british)
comb, untangle wool or cotton fibers in preparation for spinning; give a card; ask for an identification card (i.e. in a bar)
cardstock, variety of stiff paper available in a range of thicknesses
a card is a piece of stiff paper or plastic containing specific information.
a card is also a piece of stiff paper with a picture and a message which you send to someone on a special occasion.
cards are thin pieces of cardboard decorated with numbers or pictures that are used to play various games.
you can also use card to refer to something that gives you an advantage in a particular situation.
if you play your cards right, you are skilful in the way you handle a situation and make use of all your advantages.
if you say that something is on the cards, you mean that it is very likely to happen.
in the cards means the same as `on the cards'; used in american english.