Pronunciation: (im'pu-tuns), [key]
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,im'po•ten•cy,im'po•tent•ness.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.