Plain English Meaning
A pre-defined highway in the sky for lower altitudes, marked on charts as a line between two ground-based navigation stations. Pilots fly along it by tuning in those stations.
Full Definition
A low-altitude federal airway in the contiguous United States, defined by VOR navigation aids, extending from 1,200 feet above ground level up to but not including 18,000 feet MSL. Victor airways are 8 nautical miles wide (4 NM either side of centerline) and are designated by the letter V followed by a number, such as V23.
Context Anchor
You will see Victor airways on low-altitude IFR en route charts and in , such as when an to fly along V12.