Undergarment worn next to the body having legs or leg openings
Look up underpants in Wiktionary, the free dictionary.
Underpants are underwear worn on the lower body generally extending no higher than the navel.[1]
In British English they are often called simply pants.[2]
^Underpants. Collins English Dictionary – Complete & Unabridged 11th Edition. Retrieved 2 August 2012..