Definitions for go ahead
green light, go-ahead(noun)
a signal to proceed
enterprise, enterprisingness, initiative, go-ahead(verb)
readiness to embark on bold new ventures
go ahead, plow ahead(verb)
proceed (with a plan of action)
"He went ahead with the project"
Kernerman English Learner's Dictionary
to happen or to continue
The project will go ahead as planned.; They went ahead with their plans to travel.
indicates you want sb to start or continue talking
I'm sorry, go ahead.
used to give permission
"Can I take the car tonight?" "Yes, go ahead."; Go ahead and take mine - I'll get a new one.
to go somewhere before sb else
You go ahead, and we'll come to find you in a minute.
To proceed; to begin.