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With the head or front first: The cars crashed head-on.
(adverb)
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In open conflict; in direct opposition: "I have wondered since whether it would have been wiser to meet the issue head-on” ( Henry A. Kissinger).
(adverb)
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Facing forward; frontal.
(adjective)
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With the front end foremost: a head-on collision.
(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.