卡片 (kǎ piàn) literally combines 卡 (kǎ), borrowed from English 'card', and 片 (piàn), meaning 'sheet' or 'sliver' — together, they refer to a thin, flat object used for information storage, identification, or communication. It’s a general term for physical cards like business cards (名片), greeting cards (贺卡), membership cards (会员卡), or ID cards (身份证). Unlike specialized terms such as 信用卡 (credit card) or 银行卡 (bank card), 卡片 is neutral and widely applicable in everyday contexts.

This word is commonly used in both formal and informal situations — for example, exchanging cards at networking events, sending holiday greetings, or organizing study notes on flashcards (学习卡片). It does not refer to digital cards unless specified (e.g., 电子卡片), and it never means 'to get stuck' (a different meaning of 卡 as a verb). The tone on 卡 is always the third tone (kǎ), never the first (kā), when used in this compound.