约定 yuēdìng to agree on something (after discussion)
to agree on something (after discussion); to conclude a bargain; to arrange; to promise; to stipulate; to make an appointment; stipulated (time, amount, quality etc); an arrangement; a deal; appointment; undertaking; commitment; understanding; engagement; stipulation
How to remember 约定: 约 make an appointment + 定 decide = to agree on something (after discussion).
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How it is used
- To arrange/agree on (a time, terms) after discussion; a mutual agreement - 约定见面时间 (yuēdìng jiànmiàn shíjiān) agree on a meeting time; 按照约定 as agreed.
- Both verb and noun for a mutual arrangement or promise. Contrast 预约 (yùyuē, to book/reserve an appointment): 约定 is a two-sided agreement/commitment, not a reservation.