'Prone' definitions:

Definition of 'prone'

(from WordNet)
adjective
Having a tendency (to); often used in combination; "a child prone to mischief"; "failure-prone"
adjective
Lying face downward [syn: prone, prostrate]

Definition of 'Prone'

From: GCIDE
  • Prone \Prone\, a. [L. pronus, akin to Gr. ?, ?, Skr. pravana sloping, inclined, and also to L. pro forward, for. See Pro-.] [1913 Webster]
  • 1. Bending forward; inclined; not erect. [1913 Webster]
  • Towards him they bend With awful reverence prone. --Milton. [1913 Webster]
  • 2. Prostrate; flat; esp., lying with the face down; -- opposed to supine. [1913 Webster]
  • Which, as the wind, Blew where it listed, laying all things prone. --Byron. [1913 Webster]
  • 3. Headlong; running downward or headlong. "Down thither prone in flight." --Milton. [1913 Webster]
  • 4. Sloping, with reference to a line or surface; declivous; inclined; not level. [1913 Webster]
  • Since the floods demand, For their descent, a prone and sinking land. --Blackmore. [1913 Webster]
  • 5. Inclined; propense; disposed; -- applied to the mind or affections, usually in an ill sense. Followed by to. "Prone to mischief." --Shak. [1913 Webster]
  • Poets are nearly all prone to melancholy. --Landor. [1913 Webster]

Synonyms of 'prone'

From: Moby Thesaurus