someone who officially tries to prove that someone is guilty► across from one side of something to the other: · The children ran across the road.· I've always wanted to sail across the Atlantic.· We gazed across the valley.· The traffic was heavy so it took a long time to get across.across to: · He walked across to the window.
► over going from one side of something to the other, especially by flying, jumping, climbing, or using a bridge: · A cat jumped over the fence.· the road over the mountains· one of the bridges over the Rhine
► through from one side or end of something to the other -- use this about going through a town, a forest, or a crowd, or looking through a hole, window etc: · I pushed my way through the crowd.· walking through the forest· We drove through Baltimore on our way to Washington.· I could see her through the window.· The trip through the tunnel takes about 40 minutes.· We found a gap in the fence and climbed through.
► trans-: transatlantic/transcontinental/trans-European etc going a long distance across a large area of land or water: · transatlantic flights· the first transcontinental railroad
► cross to go from one side of something to the other, for example to cross a river or road, or to cross a field or room: · Antonia went to cross the street to buy us some sodas.· He plans to cross the Himalayas on foot.· How are we going to cross the river?· Before you cross, make sure there are no other cars coming.
► cut across to go straight across something such as a field or road to save time, instead of going around it or by a longer way: · Farmers have begun putting up fences to prevent visitors from cutting across their land.· They moved south along the edge of a field, then cut across Highway 18.
► cut through to go across an area such as a garden, a wood, or a group of buildings, instead of going around it on a path or road, because it is quicker: · Instead of taking the main road I cut through the churchyard and jumped over the wall at the bottom.· Her house wasn't far, if he cut through the woods.
► crossing a journey across an area of water or group of mountains: · The Atlantic crossing took nearly three months.· His party made the first east-west crossing of the Sierra Nevada in 1833.
1on or to the far side of something SYN across: 
transatlantic flights