下单 xiàdān to place an order
to place an order; to order
How to remember 下单: 下 down + 单 single = to place an order.
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How it is used
- To place an order, especially online shopping - 我已经下单了 (wǒ yǐjīng xiàdān le) I've already placed the order.
- E-commerce era vocabulary, extremely common in daily life; 单 is 'order/bill'.
- Contrast 点菜 (diǎncài) for ordering food at a table; 下单 is checkout-style ordering.