General meanings of Roundel include:
Roundel, a circular symbol used in heraldry: Roundel (heraldry) used on military aircraft as a sign of nationality: Military aircraft insignia Roundel enclosure, a Neolithic monument type: Neolithic circular enclosures in Central Europe Roundel (fortification), a type of circular artillery tower A small circular church window A Rondel dagger, a circular knife A Tondo (art), a large circular piece of art Roundel (poetry), a form of verse in English language poetry A signal roundel, a circular disk of colored glass or other translucent material for filtering white light to produce a traffic signal or railway signal of a specific color
Specific instances London Underground Roundel, the logo for transport in London Royal Air Force roundels, identification marks used by the British Airforces Roundel (magazine), a monthly periodical from the BMW Car Club of America "Roundel: The little eyes that never knew Light", a song by Sir Edward Elgar to a verse by A. C. Swinburne
See also Rondache, a small circular shield, used by soldiers in the fourteenth and fifteenth centuries Rondel (disambiguation)