Definition of overline in English:

overline

noun

  • 1A horizontal line drawn or printed above a line of text, mathematical symbol, etc.

  • 2A caption set above an illustration, especially in a newspaper or periodical.

verb

  • with object To draw a line over or above (a piece of writing, mathematical symbol, etc.).

Origin

Late 19th century; earliest use found in Journal of the Royal Statistical Society. From over- + line<br>mid 19th century; earliest use found in American Whig Review. From over- + line, perhaps after underline.

Pronunciation

overline

/ˈəʊvəˌlʌɪn/