Definition

A type of air pollution that combines smoke and fog, often caused by car emissions and other pollutants in the air.

Example

The city was covered in smog, making it hard to see the buildings.

Conversation

Have you noticed how thick the smog has been lately?

Yeah, it's really bad; I can hardly see the skyline.

I heard it's mostly from the cars and factories around here.

That makes sense; we should probably avoid going out too much.

Synonyms & Antonyms

Root Explanation

Smog is a blend of "smoke" (from Old English *smoca*, meaning vapor or smoke) and "fog" (from Old English *fogga*, meaning mist or vapor). The word "smog" refers to a type of air pollution that combines smoke and fog, creating a thick, hazy atmosphere.

Memory Tip

Think of smoke mixing with fog to create a thick haze — that's what smog means.

Visually Confused Words