Definition

Noun: * Unwanted or unusable materials: Substances or objects that are discarded because they are no longer needed or useful. This term broadly refers to the byproducts of human activity that require disposal.

Usage

• "Waste matter" is a general, formal term for discarded materials. It is often used in scientific, environmental, and technical contexts.
• It functions as a non-count noun (uncountable noun). You do not typically say "a waste matter" or "waste matters."
• It is commonly followed by verbs like , , , , and .

Examples

• The primary function of the kidneys is to filter waste matter from the blood.
• Modern cities must develop efficient systems for managing household waste matter.
• The factory was fined for improperly discharging industrial waste matter into the river.
• Composting is an excellent way to recycle organic waste matter into nutrient-rich soil.

Advanced Usage

• "Liquid/Solid waste matter": These phrases specify the physical state of the discarded material.
  • The treatment plant separates liquid waste matter from solid sludge.
• "Metabolic waste matter": A biological term for substances produced by the body's chemical processes that must be eliminated.
  • Urea is a form of metabolic waste matter excreted in urine.

Variants and Related Words

• Waste (n.): A more common and slightly less formal synonym.
  • Household waste, industrial waste.
• Waste material (n.): A term with identical meaning, often used interchangeably.
  • The sculpture was made from recycled waste material.
• Refuse (n.): A formal term for household waste or trash.
  • Refuse collection.
• Effluent (n.): Treated or untreated liquid waste, especially from industrial processes.
• Sewage (n.): Waste matter and wastewater conveyed in sewers.

Synonyms

• Refuse
• Garbage
• Trash
• Rubbish (chiefly British English)
• Debris
• Scrap
• Offal (specifically for waste parts of a butchered animal)

Related Phrases

• Waste disposal: The process of getting rid of waste matter.
  • Proper waste disposal is crucial for public health.
• Waste management: The comprehensive handling of waste matter from its creation to its final disposal.
  • She works in the field of waste management.

Noun

1. any materials unused and rejected as worthless or unwanted
   • they collect the waste once a week
   • much of the waste material is carried off in the sewers