go-ahead

Approval, agreement, or instruction to begin or proceed.

You can start as soon as you get the go-ahead from the president.

The Samson Option states that Moshe Dayan gave the go-ahead for starting weapon production in early 1968, putting the plutonium separation plant into full operation.

A flip-flop (footwear).

Progressive; exerting leadership.

I work for a very go-ahead company that's always looking for new ideas.

This turbulent ruler was a very go-ahead monarch indeed. He organised a splendid army, well-drilled and well-equipped with modern arms

Dashing; energetic.

Being a score which gives the scoring team or player the lead in the game.

The pitcher gave up the go-ahead run in the top of the ninth inning.