from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. In direct confrontation or conflict at close quarters: The two brothers went at it head-to-head. It was a head-to-head contest all the way.
- adv. Arranged in a line with the heads adjacent to each other: The bunk beds were set up head-to-head.
- adv. Running close together in the same direction; neck and neck: The horses ran mostly head-to-head.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Direct, one-to-one.
- adv. Facing one another.
- adv. Directly, one-to-one.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. even or close in a race or competition or comparison
- adj. inconclusive as to outcome; close or just even in a race or comparison or competition
- adj. involving two persons; intimately private
Sorry, no etymologies found.