WordNet sense 1 (having the leading position or higher score in a contest):

leading, in the lead

WordNet sense 2 (being or moving higher in position or greater in some value; being above a former position or level):

up

WordNet sense 3 (toward the future; forward in time):

forward

WordNet sense 4 (leading or ahead in a competition):

out front

WordNet sense 5 (in a forward direction):

forwards, onward, onwards, forrader

WordNet sense 6 (ahead of time; in anticipation):

beforehand, in advance

WordNet sense 7 (at or in the front):

before, in front