head-on collision
US /ˌhedˈɑːn kəˈlɪʒ.ən/
UK /ˌhedˈɑːn kəˈlɪʒ.ən/
1.
a collision in which the front parts of two vehicles hit each other
:
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Two cars were involved in a fatal head-on collision.
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The truck swerved to avoid a head-on collision with a bus.