What does the word plumb mean?

Usage examples for plumb

  1. You got the man that killed him- plumb. – Northern Lights by Gilbert Parker
  2. " You cain't go in unless'n you'll promise to be plumb quiet- not to open yo' mouth," Judith told her sharply. – Judith of the Cumberlands by Alice MacGowan
  3. Then he added, with a grin, The Judge has plumb ruined our quiet little expedition anyhow. – The Enchanted Canyon by Honoré Willsie Morrow