Pronunciation: (im'pu-tunt), [key]
1. not potent; lacking power or ability.
2. utterly unable (to do something).
3. without force or effectiveness.
4. lacking bodily strength or physically helpless.
5. (of a male) unable to attain or sustain a penile erection.
6. (esp. of a male) sterile.
7. Obs.without restraint.
an impotent person: therapy for sexual impotents.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.