ahead activity or the rate of forward action, specifically of a ship.
Progress toward an objective.
The clear straight room beneath a ceiling or archway; approval.
the length in time or area that separates two cars traveling equivalent path.
motion forward or forward.
ahead movement, or its rate.
The interval of time or length between the fronts of two automobiles (e.g. buses) transferring succession in identical direction, specifically along the exact same pre-determined course.
Progress toward a goal.
The clearance beneath an object, eg an arch, ceiling or bridge; headroom.
The progress made by a ship in movement; thus, development or success of all kinds.
obvious area under an arch, girder, and the like, adequate allowing of effortless passing underneath; approval; headroom.
movement forward or ahead; force or amount of these types of motion; rate of progress: stated particularly of a ship, but applied to all sorts of progress, literally or figuratively.
In architecture, obvious room in height, because from a floor to a ceiling, or from surface toward crown of an arch; specifically, the perpendicular length from any action or landing of a stair to your roof.
In coal-mining, a cross-heading.
In railroading, the. time which elapses after one train passes a certain point ahead of the following train passes that time.
vertical space offered to enable effortless passageway under something