What does "underwear" mean?

Clothes worn next to the skin, underneath outer clothing.

What is a synonym for "underwear"?

Common synonyms include: underclothes, underclothing, bodysuit, briefs, ginch, jockey briefs.

//ˈʌndəwɛə// noun, slang

noun, slang ·Common ·High school level

Noun

1
Clothes worn next to the skin, underneath outer clothing. uncountable, usually
"Don't scratch and bite, my little bear, you'll soon need bigger underwear."
2
undergarment worn next to the skin and under the outer garments wordnet
3
Underpants (boxers, briefs, panties, etc) and often bras. colloquial, uncountable, usually
"“A thong,” she answered him breathlessly. Now completely turned on by the fact that his man was sniffing her underwear and grinning like a tiger that took down its prey. That is if tigers could smile and still look sexy."