At an earlier time.
In advance.
At the front end.
Rather or sooner than.
In advance of the time when.
In front of, according to a formal system of ordering items.
In store for, in the future of (someone).
At a higher or greater position than, in a ranking.
Under consideration, judgment, authority of (someone).
In the presence of.
In front of in space.
Earlier than (in time).
To stream downward.
Further along in the flow of current, in relation to a river, stream, bloodstream, or other flow of fluid.
In the direction from the server to the client.
Towards the 3′ end of a DNA molecule.
Occurring later than something else; (also, usually, especially) influenced by something else; being a consequence of something else.
Following the path of a river or stream