1a place where roads or railway lines cross:a stream of cars was waiting for the railway crossing barriers to be opened
2a place at which one may safely cross something, especially a street:we were thirty yards from the crossing when a man stepped off the pavementa border crossing
3 [mass noun] the action of crossing something:the crossing of the Pennines
a journey across water in a ship:a short ferry crossing
4 Architecture the intersection of a church nave and the transepts:the cathedral has a lantern tower over the crossing
crossing in other Oxford dictionaries
Definition of crossing in the US English dictionary