Wordnet 3.0
ADVERB (1)
1. 
 at or in the front; 
- Example: "I see the lights of a town ahead"- Example: "the road ahead is foggy"- Example: "staring straight ahead"- Example: "we couldn't see over the heads of the people in front"- Example: "with the cross of Jesus marching on before"[syn: ahead, in front, before]
WordNet (r) 3.0 (2006):
in front
    adv 1: 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, before]