before

adv 1: earlier in time; previously; "I had known her before"; "as I said before"; "he called me the day before but your call had come even earlier"; "her parents had died four years earlier"; "I mentioned that problem earlier" syn earlier

2: at or in the front; "I see the lights of a town ahead"; "the road ahead is foggy"; "staring straight ahead"; "we couldn't see over the heads of the people in front"; "with the cross of Jesus marching on before" syn ahead, in front

Source: WordNet. Princeton University