WordWeb Online

1. To the opposite side
   "the football field was 300 feet across"
    
2. Transversely
   "the marble slabs were cut across";
   - crosswise, crossways

1. In the whole extent of; everywhere
   "climate change will be a problem across the world";
   - throughout, over, all over, all around, around, round
    
2. On the opposite side of
   "That store is across the street"

Encyclopedia: Across