1.
If you give someone or something the go-ahead , you give them permission to start doing something.
The Greek government today gave the go-ahead for five major road schemes...
Don’t do any major repair work until you get the go-ahead from your insurers.
N-SING : the N
2.
A go-ahead person or organization tries hard to succeed, often by using new methods.
Fairview Estate is one of the oldest and the most go-ahead wine producers in South Africa.
ADJ : ADJ n