headway
n. முன்னேற்றம், (கப்.) செல்லும் விரைவு அளவு, (க-க.) வளைவின் உயரம்.
Head"way`, n. 1. The progress made by a ship in motion; hence, progress or success of any kind. 2. (Arch.) Defn: Clear space under an arch, girder, and the like, sufficient to allow of easy passing underneath.