In or to the front; in advance; before: as, they walked ahead of us all the way: in nautical language, opposed to astern: as, to lie ahead.Forward; onward; with unrestrained motion or action: as, go ahead (= go on; proceed; push forward or onward; carry out your task or purpose: an idiomatic phrase said to have originated in the United States, and sometimes converted into an adjective: as, a go-ahead person); he pushed ahead with his plans.To move ahead, as in coming to anchor after the sails are furled.