If someone is ahead of you, they are directly in front of you. If someone is moving ahead of you, they are in front of you and moving in the same direction. I saw a man in a blue jacket thirty metres ahead of me She walked ahead of Helene up the steps into the hotel
In a competition, if a person or team does something ahead of someone else, they do it before the second person or team. Millar finished 1 minute and 35 seconds ahead of Thierry Claveyrolat
If an event or period of time lies ahead of you, it is going to happen or take place soon or in the future. I tried to think about all the problems that were ahead of me tomorrow She spent all night thinking about the future that lay ahead of her We have a very busy day ahead of us today. = before
If something happens ahead of schedule or ahead of time, it happens earlier than was planned. This dish may be prepared a day ahead of time and refrigerated. behind
If someone is ahead of someone else, they have made more progress and are more advanced in what they are doing. Henry generally stayed ahead of the others in the academic subjects