Definitions for "Headway"
The time interval between successive vehicles crossing a given point.
The time between passage of the front ends of two successive vehicles. See Spacing.
The time interval between two vehicles traveling in the same direction on the same route.
Keywords:  forward, boat, ship, sternway, motion
The progress made by a ship in motion; hence, progress or success of any kind.
forward movement; "the ship made little headway against the gale"
Forward movement of a ship through the water.
Clear space under an arch, girder, and the like, sufficient to allow of easy passing underneath; clearance; headroom.
vertical space available to allow easy passage under something
Directions , Navigation , Expressions Heart of Oak Life aboard
Keywords:  contrary, progress, winds
Progress, usually against contrary winds.
Keywords:  can't, toilet, get, work, making
What you are making if you can't get the toilet to work.
Keywords:  clear, see
See clear headway.