Wiktionary
n. (context transport English) A collision where the front ends of two vehicles (such as ships, trains, cars, planes, etc.) hit each other, as opposed to a side-collision or rear-end collision.
Wikipedia
A head-on collision is a traffic collision where the front ends of two vehicles such as cars, trains, ships or planes hit each other in opposite directions, as opposed to a side collision or rear-end collision.
Usage examples of "head-on collision".
For a horrible moment it had seemed as though two vehicles were headed for a head-on collision.
In trying to swing wide of a head-on collision, he put his horse into the soft ground at the lake's edge, and his horse floundered in the mud, his rider swearing.
And instead of gliding up onto a sandy beach, they have a nearly head-on collision with a vertical granite wall.
Are you planning to make us sail that damn Sargasso until navigational displace- ment if not ordinary bad luck contrives a head-on collision with an asteroid.
If such a plane is hit by anti-aircraft rocket fire what happens in the next split second would make a head-on collision between two hot-rodders seem like a mother's loving pat.
The danger of a head-on collision, he was told, was slight since motorists here enter one-way streets with full knowledge that they may meet a noncomformist.
The anxiety generated by this head-on collision is sharply intensified by expanding diversity.
For he was afraid that that first meeting between cultures would be in the nature of an ideological head-on collision, and the only possibility of cushioning the shock would be if the Federation could show that they had rescued, taken care of, and cured one of the intergalactic colonists.