English dictionary

armpit

/'/A/rm,p/I/t/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

the hollow under the arm where it is joined to the shoulder

noun.body

Examples
They were up to their armpits in water.

Synonyms axilla axillary cavity axillary fossa

Source: WordNet 3.0
The hollow beneath the junction of the arm and shoulder; the axilla.

noun

Source: webster1913