a folded piece of stiff paper with a picture, as used for various purposes
piece of paper, often with purposeful writing
Cases of word usage
1) the one on dice, playing-cards etc; card so marked (ace)
2) something that points to or indicates; pointer (on an instrument) showing measurements; an alphabetical list of names, subjects etc at the end of a book or no cards (a card index) in a library etc (index)
3) a piece of card or paper giving the holder the right to travel in a train, bus etc or to seat in a cinema etc; a printed notice of an offence against traffic regulations (ticket)
4) (in card-games) each card of a suit that has been declared as having higher value (trump)
5) (a letter, card etc sent on St Valentine's day, 14 February to) a sweetheart (valentine)