underline

/ˌʌndərˈlaɪn/

/əndəˈlaɪn/

Other forms: underlined; underlining; underlines

Definitions of underline

1. verb

   draw a line or lines underneath to call attention to
   synonyms: underscore

   type of:

   mark

   make or leave a mark on
2. verb

   give extra weight to (a communication)
   synonyms: emphasise, emphasize, underscore

   type of:

   accent, accentuate, emphasise, emphasize, punctuate, stress

   stress; single out as important
3. noun

   a line drawn underneath (especially under written matter)
   synonyms: underscore

   type of:

   stroke

   a mark made on a surface by a pen, pencil, or paintbrush