Macron (diacritic) in the context of Māori Language Act 1987

An overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text. In old mathematical notation, an overline was called a vinculum, a notation for grouping symbols which is expressed in modern notation by parentheses, though it persists for symbols under a radical sign. The original use in Ancient Greek was to indicate compositions of Greek letters as Greek numerals. In Latin, it indicates Roman numerals multiplied by a thousand and it forms medieval abbreviations (sigla). Marking one or more words with a continuous line above the characters is sometimes called overstriking, though overstriking generally refers to printing one character on top of an already-printed character.

An overline, that is, a single line above a chunk of text, should not be confused with the macron, a diacritical mark placed above (or sometimes below) individual letters. The macron is narrower than the character box.

Kenpō (Japanese: 拳法,けんぽう) is the name of several martial arts. This term is often informally transliterated as "kempo", as a result of applying Traditional Hepburn romanization, but failing to use a macron to indicate the long vowel. The word Kenpō translates to "Fist Method" (as with quanfa): "ken" meaning "fist" and "po" meaning "method/law". The generic nature of the term combined with its widespread, cross-cultural adoption in the martial arts community has led to many divergent definitions.