Definitions of bulge:

• noun:   something that bulges out or is protuberant or projects from a form
• verb:   cause to bulge or swell outwards
• verb:   swell or protrude outwards

  Example: "His eyes bulged with surprise"

• verb:   bulge out; form a bulge outward, or be so full as to appear to bulge
• verb:   bulge outward