约定：商量并确定；一般指和某人许下诺言在一定的时间去实现。现代很多歌手推出了以约定为名的歌曲，例如光良、赵传、周蕙、王菲，王心凌等歌手的音乐作品《约定》。另有日本电视剧《约定》和英国同名文集《约定》。

to conclude a bargain; to promise; appointment; stipulated (time, amount, quality etc); an arrangement; to make an appointment; engagement; commitment; understanding; undertaking; to stipulate; to arrange; stipulation; to agree on sth (after discussion); a deal