/im"peuh teuhns/ , n.
1. the condition or quality of being impotent; weakness.
2. chronic inability to attain or sustain an erection for the performance of a sexual act.
3. sterility, esp. in the male.
4. Obs. lack of self-restraint.
Also, impotency, impotentness .
[ 1375-1425; late ME, var. (see -ENCE) of impotencie impotentia want of self-control, weakness. See IM- 2 , POTENCY ]