Flag terminology is the nomenclature, or system of terms, used in vexillology, the study of flags, to describe precisely the parts, patterns, and other attributes of flags and their display.
Main article: Banderole
Main article: Banner
Main article: Burgee
Main article: Civil ensign
Main article: Civil flag
Main article: Military colours, standards and guidons
Main article: Football pitch § Pitch boundary
Main article: Maritime flag § Courtesy flag
Main article: Ensign
Main article: Fanion
Main article: Gonfalon
Main article: Jack (flag)
Main article: National flag
Main article: Pennon
Main article: Pipe banner
Main article: Prayer flag
Main article: Maritime flag § Rank flags
Main article: Flag signals
Main article: Heraldic flag § Heraldic standard
Main article: State flag
Main article: Vexilloid
Main article: Vexillum
Main article: War flag
Main article: Windsock
Main article: Canton (flag)
Main article: Flag § Hoisting the flag
Flags often inherit traits seen in traditional European heraldry designs, and as a result, patterns often share names.
Main article: Half-mast
Flag illustrations generally depict flags flying from the observer's point of view from left to right, the view known as the obverse (or "front"); the other side is the reverse (or "back"). There are some exceptions, notably some Islamic flags inscribed in Arabic, which is written from right to left; for these the obverse is defined as the side with the hoist to the observer's right.