在海商法中allision和collision均有“船舶碰撞”的含义， 其区别在于allision是指行进中的船舶与静止的物体（stationary object)，如下锚的船舶或桥墩等相撞[1]。而collision的含义则广一些，其既指船舶与静止物体相撞，即等同allision，又指两只行进中的船舶相互碰撞，即crashing together of two vessels；在指车辆碰撞也同理[2]。

[1]“ The sudden impact of a vessel with a stationary object such as an anchored vessel or a pier. ”Cf. Bryan A. Gamer, Black's Law Dictionary, 7th edition, at p. 75, West Group (1999).

[2]“ Striking together of two objects, one of which may be stationary. The term implies an impact or sudden contact of a moving body with an obstruction in its line of motion, whether both bodies are in motion or one stationary and the other, no matter which，in motion. ” Cf. The Publisher's Editorial Staff, Black's Law Dictionary, abridged 6th edition, at p. 181 , West Publishing Co. (1991).