n. The act of passing across something: as, the crossing of the Atlantic.n. Intersection: as, the crossing of bars in latticework.n. The place at which a road, ravine, mountain, river, etc., is or may be crossed or passed over: as, the crossings of streets.n. In railroads, the necessary arrangement of rails to form a communication from one track-way to the other.n. The act of opposing or thwarting; contradiction.n. The act of making the sign of the cross: as, with many protestations and crossings.n. The act or process of cross-breeding or cross-fertilizing: hybridization.