UK also pants [plural] [noun] - a piece of underwear covering the area between the waist and the tops of the legsa pair of underpantsUSAGE: 'Underpants' usually refers to men's and boy's underwear. Compare panties; knickers.
UNDERPANTS
Meaning of UNDERPANTS in English
Cambridge English vocab. Кембриджский английский словарь. 2012