D defs.my
Entry 1 sense Webster, 1913

Armpit

/är'-mpĭtˌ/ · Arm·pit · IPA /ˈɑɹmˌpɪt/
01 n. The hollow beneath the junction of the arm and shoulder; the axilla.
  1. 1.
    The hollow beneath the junction of the arm and shoulder; the axilla.