noun, masculine/ˈboɡseɾ/plural: bóxers
Boxer (a participant in the Boxer Rebellion in China); boxer shorts
Borrowed from English boxer. The sense "boxer shorts" is a pseudo-anglicism, derived from the English boxer shorts; note that while boxer does exist in English to refer to boxer shorts, it only exists as an attributive in front of other nouns, and cannot function as a standalone noun.