Adverb: under arms
- Armed and prepared for fighting
"The soldiers stood under arms, ready for inspection"
- The hollow under the arm where it is joined to the shoulder
"She applied deodorant to her underarm before leaving for work";
- armpit, axilla, axillary cavity, axillary fossa
Type of: bodily cavity, cavity, cavum
Part of: shoulder
Encyclopedia: Under arms
Underarm