Pronunciation: (in-fûr'mi-tē), [key]
—pl. -ties for 1, 3.
1. a physical weakness or ailment: the infirmities of age.
2. quality or state of being infirm; lack of strength.
3. a moral weakness or failing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.