in or to the front; in advance of; before: Walk ahead of us.
2.
in a forward direction; onward; forward: The line of cars moved ahead slowly.
3.
into or for the future: Plan ahead.
4.
so as to register a later time: to set the clock ahead.
5.
at or to a different time, either earlier or later: to push a deadline ahead one day from Tuesday to Monday; to push a deadline ahead one day from Tuesday to Wednesday.
6.
onward toward success; to a more advantageous position; upward in station: There's a young man who is sure to get ahead.