英和和英

語源 1

From underline +‎ -ing.

動詞

underlining

1. present participle and gerund of underline

名詞

underlining (countable and uncountable, plural underlinings)

1. An act or instance of marking text with an underline.

   Synonym: underlineation

   • 2005, Theodore Cheney, Getting the Words Right, page 238:

     There are so many underlinings, so many exclamation points in the margins, and so much highlighting from my many readings and appreciatings that it looks like a case of severe book abuse. It is not; these are marks of love.

語源 2

From under- +‎ lining.

名詞

underlining (plural underlinings)

1. A lining on the inside of a garment.

参考

Not to be confused with underlying.