Definition of "underarm"

underarm

/ˈʌndɚˌɑɹm/

noun
plural underarms
1. The armpit.
2. (cricket) Old-fashioned and now outlawed style of bowling in which the arm is not swung over the shoulder.
adjective
not comparable
1. For use under the arm.
  Quotations
  A 1997 study found that about 104 million American women were using underarm deodorant products.
  2001, Victoria Sherrow, For appearance' sake
verb
third-person singular simple present underarms, present participle underarming, simple past and past participle underarmed
1. (transitive) To supply with insufficient weaponry.