1. substances used to fill gaps, cracks, or holes in surfaces
2. words or sounds used to fill pauses in speech
3. content used to occupy space or time when primary material is insufficient

Examples

• The carpenter used wood fillers to repair the damaged table.
• She applied wall fillers before painting the room.
• His speech was full of fillers like ‘um’ and ‘uh.’
• The magazine included several fillers to reach the required page count.
• The newspaper used short fillers to fill empty spaces.
• Many processed foods contain fillers to reduce manufacturing costs.
• Dental fillers are used to repair cavities in teeth.