This is the 3943rd most frequent Chinese word.
买单
"买单" means "to pay the bill."
The term '买单' is used here to indicate paying the restaurant bill or settling the expense.
我想买单，可以请服务员过来吗？
I would like to settle the bill; could you bring the waiter over?
'买单' here conveys that the person has completed the payment, often implying treating others.
他已经买单了，今天他请客。
He has already paid the bill; he is treating us today.
The word '买单' in this sentence is used to describe the act of settling or finalizing payment and is linked with identifying potential discrepancies.