Definitions for "Air dam"
Used to direct or block airflow. Used in front to prevent airflow to undercarriage, intended to prevent turbulence and lift.
an aerodynamic device or spoiler in the tunnel under the bow or leading edge of a three-point hydroplane; typically a flat strip set on edge laterally (crosswise), it creates turbulence thus reducing lift.
A front spoiler mounted beneath the bumper and shaped to reduce drag created by vehicle underbody and can increase the airflow to radiators.