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1.谓没有履行约定的事项。今多指未履行约会。语本《史记.高祖本纪》:"﹝陈恢﹞乃逾城见沛公曰:'臣闻足下约先入咸阳者王之……足下前则失咸阳之约﹐后又有强宛之患。'"
[fail to keep an appointment]不去赴约 不要失约