Pronunciation: (ō'bō),[key] —n. 1. a woodwind instrument having a slender conical, tubular body and a double-reed mouthpiece.
2. (in an organ) a reed stop with a sound like that of an oboe.
3. (a word formerly used in communications to represent the letter O.)
Pronunciation: (ō'bō),[key] —n.(sometimes cap).
a navigation system utilizing two radar ground stations that measure the distance to an aircraft and then radio the information to the aircraft.