Definition of the go-ahead
: permission to do something We've finally been given the go-ahead for the project. The company received/got the go-ahead to manufacture the new drug.
Word by Word Definitions
: marked by energy and enterprise : progressive
: indicating that one may proceed
: being a score that gives a team the lead in a game
: energy, spirit
: one possessing go-ahead
: a sign, signal, or authority to proceed : green light
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