'Proneness' definitions:

Definition of 'proneness'

From: WordNet
noun
Being disposed to do something; "accident proneness"

Definition of 'Proneness'

From: GCIDE
  • Proneness \Prone"ness\, n. [1913 Webster]
  • 1. The quality or state of being prone, or of bending downward; as, the proneness of beasts is opposed to the erectness of man. [1913 Webster]
  • 2. The state of lying with the face down; -- opposed to supineness. [1913 Webster]
  • 3. Descent; declivity; as, the proneness of a hill. [1913 Webster]
  • 4. Inclination of mind, heart, or temper; propension; disposition; as, proneness to self-gratification. [1913 Webster]