To be prone to something, usually something bad, means to have a tendency to be affected by it or to do it. [+ to] ⇒ For all her experience, she was still prone to nerves. [+ to] ⇒ People with fair skin who sunburn easily are very prone to skin cancer.
-pronecombines with nouns to make adjectives that describe people who are frequently affected by something bad. ⇒ ...the most injury-prone rider on the circuit.
If you are lying prone, you are lying on your front. [formal] ⇒ Bob slid from his chair and lay prone on the floor. ⇒ Since 1991, parents have been advised not to put their infants down to sleep in the prone position.
He was as prone to share his upsetstomach with me as he was to convey his thoughts.Robin Hobb THE GOLDEN FOOL: BOOK TWO OF THE TAWNY MANIf you leave me alone I shall take up the prone position like a good girl.Conybeare, Stephanie A DEATH IN THE FAMILYThey lay prone side by side, in the Corpse position under the spreading branches of the oak.Aldiss, Brian SOMEWHERE EAST OF LIFEIn hectic times, people are more prone to project the uncertainties of the world onto something tangible.Gregg Andrew Hurwitz MINUTES TO BURN