Pollutant: Definition, Usage & Common Types

Meaning 1：contaminating substance (pollutant)

pollutant 🔊

/pəˈluːtnt/

Something that makes air, water, or soil dirty and harmful to people, animals, or plants.

Pollutant illustration showing industrial smoke pollution from factory chimneys

contaminating substance 🔊

➕

/kənˈtæmɪneɪtɪŋ ˈsʌbstəns/

Any substance or energy introduced into the environment that has undesired harmful effects, typically as a result of human activity.

📁 Category：Natural Geography 🔖 Level：Intermediate

📘 Details & Usage

📖 Root Explanation

From Latin 'polluere' (to soil, defile) + '-ant' (noun suffix denoting agent).

💡 Mnemonic

Think: 'Pollute' + 'ant'. An 'ant' is usually clean, but a 'pollutant' makes everything dirty.

📖 Example

The black smoke coming from the car's exhaust pipe is a major pollutant in the city air. 🔊 The black smoke emitted from a vehicle's tailpipe represents a significant contaminant in urban air.

🔗 Collocations

major pollutant – A primary or significant contaminating substance.

air pollutant – A contaminant present in the atmosphere.

remove pollutants – To eliminate or filter out contaminating substances.

🔄 Synonyms

contaminant (n.) – A substance that makes something impure or unclean by contact or mixture.

impurity (n.) – A foreign element that lowers the purity or quality of a substance.

toxin (n.) – A poisonous substance, especially one produced by living organisms.

🚫 Antonyms

purifier (n.) – An agent or device that removes contaminants or impurities.

🌱 Derivatives

pollute (v.) – To make air, water, or soil dirty and harmful.

pollution (n.) – The presence or introduction of harmful substances into the environment.

polluted (adj.) – Made dirty or harmful by the addition of pollutants.

📖 Cultural Story

The word stems from Latin 'polluere' (to defile). Its modern prominence surged in the mid-20th century with the rise of the environmental movement, making it a key term in ecological science and policy debates.