Definition
A ground-based radio navigation aid operating in the very-high frequency band (108.0–117.95 MHz) that transmits signals in every direction, allowing a suitably equipped aircraft to determine its bearing to or from the station along any of 360 selectable courses (radials). The pilot uses a VOR receiver and course deviation indicator in the cockpit to fly toward, away from, or across the station on a chosen radial.
Plain English
A radio beacon on the ground that broadcasts signals in all directions. The aircraft's receiver uses those signals to tell the pilot which direction the station is from the aircraft, so the pilot can use it as a reference point for navigation.
Context Anchor
Seen in instrument flying, navigation planning, approach procedures, and cockpit navigation displays when using ground-based radio navigation.
Derivation
Built from three plain-English parts. 'Very-high frequency' describes the radio band the station uses (30–300 MHz). 'Omnidirectional' comes from Latin omni- (all) and direction — meaning it transmits in every direction at once. 'Range' here is older navigation terminology for a ground station that gives directional guidance, not a measurement of distance.
Why Pilots Care
Supplies dependable course guidance and position fixes when visual references are unavailable, forming the backbone of many instrument routes and approaches.
Analogy
A VOR is like a lighthouse that sends out invisible compass lines in every direction. The aircraft’s receiver helps the pilot tell which line the airplane is on.
Intuition Check
Do not read “range” here as fuel range or flying distance. In this term, “range” means a radio navigation aid that helps define direction from a ground station.
Example Sentence 1
Cleared direct to the Dubuque VOR, the pilot tuned the frequency, identified the station by its Morse code, and centered the needle on the inbound radial.
Example Sentence 2
ATC cleared the flight direct to the VOR so the crew could establish on the airway.