underscore underscore /ˌəndɝˈskɔr/

noun

1. A line drawn underneath (especially under written matter)  ( underline , underscore )
   a line drawn underneath (especially under written matter)
   

verb

1. () Give extra weight to (a communication)  ( emphasise [British] , emphasize , underscore , underline )
   give extra weight to (a communication)
    Her gesture emphasized her words
   Her gesture emphasized her words
   
2. Draw a line or lines underneath to call attention to  ( underline , underscore )
   draw a line or lines underneath to call attention to