1. a person or thing that contaminates or pollutes something

Examples

• The factory was identified as the main contaminator of the river.
• Industrial waste is a major contaminator of groundwater supplies.
• Scientists traced the contaminator to a leaking storage tank.
• The contaminator released harmful chemicals into the atmosphere.
• Identifying the contaminator was crucial for cleaning up the site.
• Bacteria can act as a contaminator in laboratory samples if proper sterilization is not followed.