| 1. | of, situated, or for use under the arm or in the armpit: an underarm deodorant. |
| 2. | underhand: an underarm pitch in softball. |
| 3. | armpit. |
| 4. | underhand. |
underarm un·der·arm (ŭn'dər-ärm')
adj.
Located, placed, or used under the arm. n.
The armpit.