operation/͵ɑpəˋreʃən; ˌɒpəˈreIʃ$n/n 1 [C] when doctors cut into someone's body to repair or remove a part that is damaged 手术: She's having her operation today. 她今天要接受手术。+on He's recovering from an operation on his shoulder. 他肩部动了手术﹐正在恢复中。a heart operation 心脏手术2 [C] when people work together in a planned way in order to do something〔有计划的集体〕活动﹐行动: a rescue operation 救援行动3 [C,U] the work of a business or organization, or one of the parts of a company or organization〔公司或机构的〕经营﹐业务﹔部门: Many small businesses fail in the first year of operation. 许多小公司开业第一年即倒闭。the company's property development operation 公司的房地产开发业务4 [U] the way in which something works, or when someone makes something work 运转﹐运行﹔操作: The job involves the operation of heavy machinery. 这工作需要操作重型机器。5 in/into operation if a system or machine is in operation, it is working 操作[运行]中/开始实施: Video cameras were in operation. 摄录机正在拍摄。The new system came into operation in 1999. 新制度于 1999 年开始实施。6 [C] technical an action done by a computer【术语】〔电脑的〕运算﹐运行