Noun

1. Traveling across
2. A shallow area in a stream that can be forded
3. A point where two lines (paths or arcs etc.) intersect
4. A junction where one street or road crosses another
5. A path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other
6. (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
7. A voyage across a body of water (usually across the atlantic ocean)