overline

over- +‎ line, by analogy with underline.

overline (plural overlines)

1. Synonym of overbar

overline (third-person singular simple present overlines, present participle overlining, simple past and past participle overlined)

1. To draw a line over or above text.

overline (not comparable)

1. Passing over a railway line.
   • 1960 March, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 176:

     Despite this slight delay, a bad slowing at Borrowash for an overline bridge under construction, and signals outside Derby, we arrived there "on time" by the public book, though 1¾ min. late by the working book.

   • 1967, Great Britain. Parliament. House of Commons, Papers by Command, volume 39, page 51:

     The total cost of overline bridges in 1965 was £1,506,000 […]

• overtrack