armpit Meaning, Definition & Usage

  1. noun the hollow under the arm where it is joined to the shoulder
    axillary fossa; axilla; axillary cavity.
    • they were up to their armpits in water

WordNet


Arm"pit` noun
Etymology
Arm + pit.
Definitions
  1. The hollow beneath the junction of the arm and shoulder; the axilla.

Webster 1913