1. card (information, filing, etc.)
このカードには様々な指示が書かれてるわ。All sorts of instructions are written on this card.
2. card (greetings, congratulations, etc.)
カードもプレゼントもない。There are no cards or presents.
3. (Western) playing cards
カードを開いた後、ゲームを続けるか、降りるかを決定する。After the cards are turned face up, you decide whether to stay in the game or fold.
4. credit card; debit card
カードで払いますわ。I will pay with a card.
5. card; program; matchup; pairing
6. card (to play); (one's) hand; bargaining chip; leverage; tactic
じゃあこっちもこのカードを切らざるを得ないな。Then I'll have no choice but to play this card too.
7. dough scraper; spatula