head-on - {adj.} or {adv. phr.} 1. With the head or front pointing at; with the front facing; front end to front end. * /Our car skidded into a head-on crash with the truck./ * /In the fog the boat ran head-on into a log./ * /There is a head-on view of the parade from our house./ Compare: FACE-TO-FACE. Contrast: REAR-END. 2. In a way that is exactly opposite; against or opposed to in argument. * /If you think a rule should be changed, a head-on attack against it is best./ * /Tom did not want to argue head-on what the teacher said, so he said nothing./