Meaning of the word "long johns" in English

What does "long johns" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

long johns

US /ˈlɔŋ ˌdʒɑːnz/
UK /ˈlɒŋ ˌdʒɒnz/

Plural Noun

a single piece of underwear covering the body from the neck to the ankles, worn especially in cold weather

Example:
He put on his thermal long johns before heading out into the snow.
My grandmother always wears long johns in the winter to stay warm.