- (of two objects) meeting with the fronts or heads foremost: a head-on collision.
- facing the direction of forward motion or alignment; frontal.
- characterized by direct opposition: a head-on confrontation.
- with the front or head foremost, especially in a collision: She stepped out of the front door and walked head-on into her husband.
- with the front or fronts foremost
- with directness or without compromise
