If you give someone or something the go-ahead, you give them permission to start doing something.
例句
The Greek government today gave the go-ahead for five major road schemes...希腊政府今天批准了5项重大的道路修建方案。Don't do any major repair work until you get the go-ahead from your insurers.除非经保险公司同意，否则不要进行任何大修。
ADJ-GRADED
有进取心的；具有开拓精神的
A go-ahead person or organization tries hard to succeed, often by using new methods.