Definition of "boxer"

boxer

/ˈbɒksə/

noun
plural boxers
1. A participant (fighter) in a boxing match.
2. A breed of stocky, medium-sized, short-haired dog with a square-jawed muzzle.
3. A type of internal combustion engine in which cylinders are arranged in two banks on either side of a single crankshaft.
4. The person running a game of two-up.
5. One who packs boxes.
  Quotations
  They look over the boxes that have been packed, pass judgment upon defects detected by the boxers, and O. K. the boxes […]
  1917, Vocational Education Survey of Minneapolis, Minn, page 385
6. A letterboxer.
7. Attributive form of boxers (“boxer shorts”).
  Quotations
  Jockey International, the major boxer maker, has a design for everyone: jungle prints featuring the irrepressible Garfield the cat peeping out between the leaves; […]
  1987, Health, volume 19
  My husband, Zac, noticed my laundry shortcomings when his sock and boxer drawer came up empty, and kindly asked if I could please do some laundry.
  2011, Jennie Allen, “Mad”, in Stuck Study: The Places We Get Stuck & the God Who Sets Us Free, Nashville, Tenn.: Thomas Nelson, page 38
  The boxer-type underwear would tear and get tangled up, and the brief kind would get too binding and hot, so we might not wear either.
  2012, “Dennis Miller”, in Ronald H. Dykes, “They Wouldn’t Let Us Win”: Jackson County, Alabama, Veterans Relive the Vietnam War, Bloomington, Ind.: iUniverse, Inc., page 72